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id="toc-Example-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Version_detection" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Version_detection"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Version detection</span> </div> </a> <ul id="toc-Version_detection-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Implementations" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Implementations"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Implementations</span> </div> </a> <ul id="toc-Implementations-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Future_work" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Future_work"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Future work</span> </div> </a> <ul id="toc-Future_work-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " 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Available in 14 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-14" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">14 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D9%8A99" title="سي99 – Arabic" lang="ar" hreflang="ar" data-title="سي99" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/C_(%D0%B5%D0%B7%D0%B8%D0%BA_%D0%B7%D0%B0_%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%B8%D1%80%D0%B0%D0%BD%D0%B5)#C99" title="C (език за програмиране) – Bulgarian" lang="bg" hreflang="bg" data-title="C (език за програмиране)" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/C99" title="C99 – Catalan" lang="ca" hreflang="ca" data-title="C99" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/C99_(Est%C3%A1ndar_de_C)" title="C99 (Estándar de C) – Spanish" lang="es" hreflang="es" data-title="C99 (Estándar de C)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/C99" title="C99 – Korean" lang="ko" hreflang="ko" data-title="C99" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/C99_(linguaggio_di_programmazione)" title="C99 (linguaggio di programmazione) – Italian" lang="it" hreflang="it" data-title="C99 (linguaggio di programmazione)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/C99" title="C99 – Japanese" lang="ja" hreflang="ja" data-title="C99" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/C99" title="C99 – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="C99" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/C99" title="C99 – Polish" lang="pl" hreflang="pl" data-title="C99" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/C99" title="C99 – Russian" lang="ru" hreflang="ru" data-title="C99" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/C99" title="C99 – Finnish" lang="fi" hreflang="fi" data-title="C99" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/C99" title="C99 – Swedish" lang="sv" hreflang="sv" data-title="C99" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/C99" title="C99 – Ukrainian" lang="uk" hreflang="uk" data-title="C99" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/C99" title="C99 – Chinese" lang="zh" hreflang="zh" data-title="C99" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1151257#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/C99" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a 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</ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">C programming language standard, 1999 revision</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about the programming language dialect. For other uses, see <a href="/wiki/C99_(disambiguation)" class="mw-disambig" title="C99 (disambiguation)">C99 (disambiguation)</a>.</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-Missing_information plainlinks metadata ambox ambox-content" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Wiki_letter_w.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/44px-Wiki_letter_w.svg.png" decoding="async" width="44" height="44" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/66px-Wiki_letter_w.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/6/6c/Wiki_letter_w.svg/88px-Wiki_letter_w.svg.png 2x" data-file-width="44" data-file-height="44" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This <b>is missing information</b> about _Pragma(), FP_CONTRACT, CX_LIMITED_RANGE.<span class="hide-when-compact"> Please expand the to include this information. Further details may exist on the <a href="/wiki/Talk:C99" title="Talk:C99">talk page</a>.</span> <span class="date-container"><i>(<span class="date">November 2020</span>)</i></span></div></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist 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a{color:var(--color-progressive)!important}}@media print{body.ns-0 .mw-parser-output .sidebar{display:none!important}}</style><table class="sidebar nomobile nowraplinks"><tbody><tr><th class="sidebar-title"><a href="/wiki/C_(programming_language)#History" title="C (programming language)">C language revisions</a></th></tr><tr><td class="sidebar-content hlist"> <ul><li><a href="/wiki/K%26R_C" class="mw-redirect" title="K&R C">K&R C</a></li> <li><a href="/wiki/ANSI_C" title="ANSI C">ANSI C</a></li> <li><a class="mw-selflink selflink">C99</a></li> <li><a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a></li> <li><a href="/wiki/C17_(C_standard_revision)" title="C17 (C standard revision)">C17</a></li> <li><a href="/wiki/C23_(C_standard_revision)" title="C23 (C standard revision)">C23</a></li> <li><a href="/wiki/C_(programming_language)#C2Y" title="C (programming language)">C2Y</a></li></ul></td> </tr><tr><td class="sidebar-navbar"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:C_language_revisions" title="Template:C language revisions"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:C_language_revisions" title="Template talk:C language revisions"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:C_language_revisions" title="Special:EditPage/Template:C language revisions"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <figure typeof="mw:File/Thumb"><a href="/wiki/File:ISO-IEC-9899-1999-cover.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/ISO-IEC-9899-1999-cover.png/250px-ISO-IEC-9899-1999-cover.png" decoding="async" width="180" height="255" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b6/ISO-IEC-9899-1999-cover.png/330px-ISO-IEC-9899-1999-cover.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b6/ISO-IEC-9899-1999-cover.png/500px-ISO-IEC-9899-1999-cover.png 2x" data-file-width="1651" data-file-height="2338" /></a><figcaption>Cover of the C99 standards document</figcaption></figure> <p><b>C99</b> (previously <b>C9X</b>, formally <b>ISO/IEC 9899:1999</b>) is a past version of the <a href="/wiki/C_(programming_language)" title="C (programming language)">C</a> programming language <a href="/wiki/Open_standard" title="Open standard">open standard</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> It extends the previous version (<a href="/wiki/C90_(C_version)" class="mw-redirect" title="C90 (C version)">C90</a>) with new features for the language and the <a href="/wiki/C_standard_library" title="C standard library">standard library</a>, and helps implementations make better use of available computer hardware, such as <a href="/wiki/IEEE_754-1985" title="IEEE 754-1985">IEEE 754-1985</a> <a href="/wiki/Floating-point_arithmetic" title="Floating-point arithmetic">floating-point arithmetic</a>, and compiler technology.<sup id="cite_ref-grouper.ieee.org_2-0" class="reference"><a href="#cite_note-grouper.ieee.org-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The <a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a> version of the C programming language standard, published in 2011, updates C99. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>After <a href="/wiki/ANSI" class="mw-redirect" title="ANSI">ANSI</a> produced the official standard for the C programming language in 1989, which became an international standard in 1990, the C language specification remained relatively static for some time, while <a href="/wiki/C%2B%2B" title="C++">C++</a> continued to evolve, largely during its own standardization effort. Normative Amendment 1 created a new standard for C in 1995, but only to correct some details of the 1989 standard and to add more extensive support for international character sets. The standard underwent further revision in the late 1990s, leading to the publication of ISO/IEC 9899:1999 in 1999, which was adopted as an ANSI standard in May 2000. The language defined by that version of the standard is commonly referred to as "C99". The international C standard is maintained by the <a href="/wiki/Working_group" title="Working group">working group</a> <a href="/wiki/SC22" class="mw-redirect" title="SC22">ISO/IEC JTC1/SC22</a>/WG14. </p> <div class="mw-heading mw-heading2"><h2 id="Design">Design</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=2" title="Edit section: Design"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:1999_ISO_C_Concepts.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/30/1999_ISO_C_Concepts.png/220px-1999_ISO_C_Concepts.png" decoding="async" width="220" height="311" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/30/1999_ISO_C_Concepts.png/330px-1999_ISO_C_Concepts.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/30/1999_ISO_C_Concepts.png/440px-1999_ISO_C_Concepts.png 2x" data-file-width="794" data-file-height="1123" /></a><figcaption></figcaption></figure> <p>C99 is, for the most part, backward compatible with C89, but it is stricter in some ways.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>In particular, a declaration that lacks a type specifier no longer has <code>int</code> implicitly assumed. The C standards committee decided that it was of more value for compilers to diagnose inadvertent omission of the type specifier than to silently process legacy code that relied on implicit <code>int</code>. In practice, compilers are likely to display a warning, then assume <code>int</code> and continue translating the program. </p><p>C99 introduced several new features, many of which had already been implemented as extensions in several compilers:<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <ul><li><a href="/wiki/Inline_function" title="Inline function">inline functions</a></li> <li>intermingled declarations and code: <a href="/wiki/Variable_(programming)" class="mw-redirect" title="Variable (programming)">variable</a> declaration is no longer restricted to file scope or the start of a compound statement (block)</li> <li>several new <a href="/wiki/Data_type" title="Data type">data types</a>, including <code>long long int</code>, optional extended integer types, an explicit <a href="/wiki/Boolean_data_type" title="Boolean data type">Boolean data type</a>, and a <code>complex</code> type to represent <a href="/wiki/Complex_number" title="Complex number">complex numbers</a></li> <li><a href="/wiki/Variable-length_array" title="Variable-length array">variable-length arrays</a> (although subsequently relegated in <a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a> to a conditional feature that implementations are not required to support)</li> <li><a href="/wiki/Flexible_array_member" title="Flexible array member">flexible array members</a></li> <li>support for one-line <a href="/wiki/Comment_(programming)" class="mw-redirect" title="Comment (programming)">comments</a> beginning with <code>//</code>, as in <a href="/wiki/BCPL" title="BCPL">BCPL</a>, <a href="/wiki/C%2B%2B" title="C++">C++</a> and <a href="/wiki/Java_(programming_language)" title="Java (programming language)">Java</a></li> <li>new library functions, such as <code>snprintf</code></li> <li>new <a href="/wiki/Header_file" class="mw-redirect" title="Header file">headers</a>, such as <code><<a href="/wiki/Stdbool.h" class="mw-redirect" title="Stdbool.h">stdbool.h</a>></code>, <code><<a href="/wiki/Complex.h" class="mw-redirect" title="Complex.h">complex.h</a>></code>, <code><<a href="/wiki/Tgmath.h" class="mw-redirect" title="Tgmath.h">tgmath.h</a>></code>, and <code><<a href="/wiki/Inttypes.h" class="mw-redirect" title="Inttypes.h">inttypes.h</a>></code></li> <li>type-generic math (macro) functions, in <code><tgmath.h></code>, which select a <a href="/wiki/Math_library" title="Math library">math library</a> <a href="/wiki/Library_function" class="mw-redirect" title="Library function">function</a> based upon <code>float</code>, <code>double</code>, or <code>long double</code> arguments, etc.</li> <li>improved support for <a href="/wiki/IEEE_floating_point" class="mw-redirect" title="IEEE floating point">IEEE floating point</a></li> <li>designated initializers. For example, initializing a structure by field names: <code>struct point p = { .x = 1, .y = 2 };</code><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></li> <li>compound literals. For instance, it is possible to construct structures in function calls: <code>function((struct x) {1, 2})</code><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li> <li>support for <a href="/wiki/Variadic_macro" class="mw-redirect" title="Variadic macro">variadic macros</a> (macros with a variable number of arguments)</li> <li><code><a href="/wiki/Restrict" title="Restrict">restrict</a></code> qualification allows more aggressive code <a href="/wiki/Optimization_(computer_science)" class="mw-redirect" title="Optimization (computer science)">optimization</a>, removing compile-time array access advantages previously held by <a href="/wiki/FORTRAN" class="mw-redirect" title="FORTRAN">FORTRAN</a> over ANSI C<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></li> <li>universal character names, which allows user variables to contain other characters than the standard character set: four-digit <code class="mw-highlight mw-highlight-lang-text mw-content-ltr" style="" dir="ltr">\u0040</code> or eight-digit hexadecimal sequences <code class="mw-highlight mw-highlight-lang-text mw-content-ltr" style="" dir="ltr">\U0001f431</code></li> <li>keyword <code>static</code> in array indices in parameter declarations<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup></li></ul> <p>Parts of the C99 standard are included in the current version of the <a href="/wiki/C%2B%2B" title="C++">C++</a> standard, including integer types, headers, and library functions. Variable-length arrays are not among these included parts because C++'s <a href="/wiki/Standard_Template_Library" title="Standard Template Library">Standard Template Library</a> already includes similar functionality. </p> <div class="mw-heading mw-heading2"><h2 id="IEEE_754_floating-point_support">IEEE 754 floating-point support</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=3" title="Edit section: IEEE 754 floating-point support"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A major feature of C99 is its numerics support, and in particular its support for access to the features of <a href="/wiki/IEEE_754-1985" title="IEEE 754-1985">IEEE 754-1985</a> (also known as IEC 60559) <a href="/wiki/Floating-point" class="mw-redirect" title="Floating-point">floating-point</a> hardware present in the vast majority of modern processors (defined in "Annex F IEC 60559 floating-point arithmetic"). Platforms without IEEE 754 hardware can also implement it in software.<sup id="cite_ref-grouper.ieee.org_2-1" class="reference"><a href="#cite_note-grouper.ieee.org-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>On platforms with IEEE 754 floating point: </p> <div><ul><li><code>float</code> is defined as IEEE 754 <a href="/wiki/Single-precision_floating-point_format" title="Single-precision floating-point format">single precision</a>, <code>double</code> is defined as <a href="/wiki/Double-precision_floating-point_format" title="Double-precision floating-point format">double precision</a>, and <code><a href="/wiki/Long_double" title="Long double">long double</a></code> is defined as IEEE 754 <a href="/wiki/Extended_precision" title="Extended precision">extended precision</a> (e.g., Intel 80-bit <a href="/wiki/Extended_precision" title="Extended precision">double extended</a> precision on <a href="/wiki/X86" title="X86">x86</a> or <a href="/wiki/X86-64" title="X86-64">x86-64</a> platforms), or some form of <a href="/wiki/Quadruple-precision_floating-point_format" title="Quadruple-precision floating-point format">quad precision</a> where available; otherwise, it is double precision.</li><li>The four arithmetic operations and square root are correctly rounded as defined by IEEE 754. <table class="wikitable floatright" style="margin-left: 1.5em; font-family:monospace;"> <tbody><tr> <th>FLT_EVAL_METHOD</th> <th>float</th> <th>double</th> <th>long double </th></tr> <tr> <td>0</td> <td>float</td> <td>double</td> <td>long double </td></tr> <tr> <td>1</td> <td>double</td> <td>double</td> <td>long double </td></tr> <tr> <td>2</td> <td>long double</td> <td>long double</td> <td>long double </td></tr></tbody></table></li><li>Expression evaluation is defined to be performed in one of three well-defined methods, indicating whether floating-point variables are first promoted to a more precise format in expressions: <code>FLT_EVAL_METHOD == 2</code> indicates that all internal intermediate computations are performed by default at high precision (long double) where available (e.g., <a href="/wiki/Extended_precision" title="Extended precision">80 bit double extended</a>), <code>FLT_EVAL_METHOD == 1</code> performs all internal intermediate expressions in double precision (unless an operand is long double), while <code>FLT_EVAL_METHOD == 0</code> specifies each operation is evaluated only at the precision of the widest operand of each operator. The intermediate result type for operands of a given precision are summarized in the adjacent table.</li></ul></div> <p><code>FLT_EVAL_METHOD == 2</code> tends to limit the risk of <a href="/wiki/Round-off_error" title="Round-off error">rounding errors</a> affecting numerically unstable expressions (see <a href="/wiki/Floating_point#IEEE_754_design_rationale" class="mw-redirect" title="Floating point">IEEE 754 design rationale</a>) and is the designed default method for <a href="/wiki/X87" title="X87">x87</a> hardware, but yields unintuitive behavior for the unwary user;<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> <code>FLT_EVAL_METHOD == 1</code> was the default evaluation method originally used in <a href="/wiki/K%26R_C" class="mw-redirect" title="K&R C">K&R C</a>, which promoted all floats to double in expressions; and <code>FLT_EVAL_METHOD == 0</code> is also commonly used and specifies a strict "evaluate to type" of the operands. (For <a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">gcc</a>, <code>FLT_EVAL_METHOD == 2</code> is the default on 32 bit x86, and <code>FLT_EVAL_METHOD == 0</code> is the default on 64 bit x86-64, but <code>FLT_EVAL_METHOD == 2</code> can be specified on x86-64 with option -mfpmath=387.) Before C99, compilers could round intermediate results inconsistently, especially when using <a href="/wiki/X87" title="X87">x87</a> floating-point hardware, leading to compiler-specific behaviour;<sup id="cite_ref-stackinterview_10-0" class="reference"><a href="#cite_note-stackinterview-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> such inconsistencies are not permitted in compilers conforming to C99 (annex F). </p> <div class="mw-heading mw-heading3"><h3 id="Example">Example</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=4" title="Edit section: Example"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following annotated example C99 code for computing a continued fraction function demonstrates the main features: </p> <div class="mw-highlight mw-highlight-lang-c mw-content-ltr mw-highlight-lines" dir="ltr"><pre><span></span><span class="linenos" data-line="1"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdio.h></span> <span class="linenos" data-line="2"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><math.h></span> <span class="linenos" data-line="3"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><float.h></span> <span class="linenos" data-line="4"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><fenv.h></span> <span class="linenos" data-line="5"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><tgmath.h></span> <span class="linenos" data-line="6"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><stdbool.h></span> <span class="linenos" data-line="7"></span><span class="cp">#include</span><span class="w"> </span><span class="cpf"><assert.h></span> <span class="linenos" data-line="8"></span> <span class="hll"><span class="linenos" data-line="9"></span><span class="kt">double</span><span class="w"> </span><span class="nf">compute_fn</span><span class="p">(</span><span class="kt">double</span><span class="w"> </span><span class="n">z</span><span class="p">)</span><span class="w"> </span><span class="c1">// [1]</span> </span><span class="linenos" data-line="10"></span><span class="p">{</span> <span class="hll"><span class="linenos" data-line="11"></span><span class="w"> </span><span class="cp">#pragma STDC FENV_ACCESS ON </span><span class="c1">// [2]</span> </span><span class="linenos" data-line="12"></span> <span class="hll"><span class="linenos" data-line="13"></span><span class="w"> </span><span class="n">assert</span><span class="p">(</span><span class="n">FLT_EVAL_METHOD</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">2</span><span class="p">);</span><span class="w"> </span><span class="c1">// [3]</span> </span><span class="linenos" data-line="14"></span> <span class="hll"><span class="linenos" data-line="15"></span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">isnan</span><span class="p">(</span><span class="n">z</span><span class="p">))</span><span class="w"> </span><span class="c1">// [4]</span> </span><span class="linenos" data-line="16"></span><span class="w"> </span><span class="n">puts</span><span class="p">(</span><span class="s">"z is not a number"</span><span class="p">);</span> <span class="linenos" data-line="17"></span> <span class="linenos" data-line="18"></span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">isinf</span><span class="p">(</span><span class="n">z</span><span class="p">))</span> <span class="linenos" data-line="19"></span><span class="w"> </span><span class="n">puts</span><span class="p">(</span><span class="s">"z is infinite"</span><span class="p">);</span> <span class="linenos" data-line="20"></span> <span class="hll"><span class="linenos" data-line="21"></span><span class="w"> </span><span class="kt">long</span><span class="w"> </span><span class="kt">double</span><span class="w"> </span><span class="n">r</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">7.0</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">3.0</span><span class="o">/</span><span class="p">(</span><span class="n">z</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">2.0</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">1.0</span><span class="o">/</span><span class="p">(</span><span class="n">z</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">7.0</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mf">10.0</span><span class="o">/</span><span class="p">(</span><span class="n">z</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">2.0</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">2.0</span><span class="o">/</span><span class="p">(</span><span class="n">z</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="mf">3.0</span><span class="p">))));</span><span class="w"> </span><span class="c1">// [5, 6]</span> </span><span class="linenos" data-line="22"></span> <span class="hll"><span class="linenos" data-line="23"></span><span class="w"> </span><span class="n">feclearexcept</span><span class="p">(</span><span class="n">FE_DIVBYZERO</span><span class="p">);</span><span class="w"> </span><span class="c1">// [7]</span> </span><span class="linenos" data-line="24"></span> <span class="hll"><span class="linenos" data-line="25"></span><span class="w"> </span><span class="kt">bool</span><span class="w"> </span><span class="n">raised</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">fetestexcept</span><span class="p">(</span><span class="n">FE_OVERFLOW</span><span class="p">);</span><span class="w"> </span><span class="c1">// [8]</span> </span><span class="linenos" data-line="26"></span> <span class="linenos" data-line="27"></span><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">raised</span><span class="p">)</span> <span class="linenos" data-line="28"></span><span class="w"> </span><span class="n">puts</span><span class="p">(</span><span class="s">"Unanticipated overflow."</span><span class="p">);</span> <span class="linenos" data-line="29"></span> <span class="linenos" data-line="30"></span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">r</span><span class="p">;</span> <span class="linenos" data-line="31"></span><span class="p">}</span> <span class="linenos" data-line="32"></span> <span class="linenos" data-line="33"></span><span class="kt">int</span><span class="w"> </span><span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span> <span class="linenos" data-line="34"></span><span class="p">{</span> <span class="linenos" data-line="35"></span><span class="w"> </span><span class="cp">#ifndef __STDC_IEC_559__</span> <span class="hll"><span class="linenos" data-line="36"></span><span class="w"> </span><span class="n">puts</span><span class="p">(</span><span class="s">"Warning: __STDC_IEC_559__ not defined. IEEE 754 floating point not fully supported."</span><span class="p">);</span><span class="w"> </span><span class="c1">// [9]</span> </span><span class="linenos" data-line="37"></span><span class="w"> </span><span class="cp">#endif</span> <span class="linenos" data-line="38"></span> <span class="linenos" data-line="39"></span><span class="w"> </span><span class="cp">#pragma STDC FENV_ACCESS ON</span> <span class="linenos" data-line="40"></span> <span class="linenos" data-line="41"></span><span class="w"> </span><span class="cp">#ifdef TEST_NUMERIC_STABILITY_UP</span> <span class="hll"><span class="linenos" data-line="42"></span><span class="w"> </span><span class="n">fesetround</span><span class="p">(</span><span class="n">FE_UPWARD</span><span class="p">);</span><span class="w"> </span><span class="c1">// [10]</span> </span><span class="linenos" data-line="43"></span><span class="w"> </span><span class="cp">#elif TEST_NUMERIC_STABILITY_DOWN</span> <span class="linenos" data-line="44"></span><span class="w"> </span><span class="n">fesetround</span><span class="p">(</span><span class="n">FE_DOWNWARD</span><span class="p">);</span> <span class="linenos" data-line="45"></span><span class="w"> </span><span class="cp">#endif</span> <span class="linenos" data-line="46"></span> <span class="linenos" data-line="47"></span><span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"%.7g</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">compute_fn</span><span class="p">(</span><span class="mf">3.0</span><span class="p">));</span> <span class="linenos" data-line="48"></span><span class="w"> </span><span class="n">printf</span><span class="p">(</span><span class="s">"%.7g</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span><span class="w"> </span><span class="n">compute_fn</span><span class="p">(</span><span class="n">NAN</span><span class="p">));</span> <span class="linenos" data-line="49"></span> <span class="linenos" data-line="50"></span><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span> <span class="linenos" data-line="51"></span><span class="p">}</span> </pre></div> <p>Footnotes: </p> <ol><li>Compile with: <code class="mw-highlight mw-highlight-lang-bash mw-content-ltr" style="" dir="ltr">gcc<span class="w"> </span>-std<span class="o">=</span>c99<span class="w"> </span>-mfpmath<span class="o">=</span><span class="m">387</span><span class="w"> </span>-o<span class="w"> </span>test_c99_fp<span class="w"> </span>test_c99_fp.c<span class="w"> </span>-lm</code></li> <li>As the IEEE 754 status flags are manipulated in this function, this #pragma is needed to avoid the compiler incorrectly rearranging such tests when optimising. (Pragmas are usually implementation-defined, but those prefixed with <code>STDC</code> are defined in the C standard.)</li> <li>C99 defines a limited number of expression evaluation methods: the current compilation mode can be checked to ensure it meets the assumptions the code was written under.</li> <li>The special values such as <a href="/wiki/NaN" title="NaN">NaN</a> and positive or negative infinity can be tested and set.</li> <li><code>long double</code> is defined as IEEE 754 double extended or quad precision if available. Using higher precision than required for intermediate computations can minimize <a href="/wiki/Round-off_error" title="Round-off error">round-off error</a><sup id="cite_ref-Baleful_11-0" class="reference"><a href="#cite_note-Baleful-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> (the <a href="/wiki/Typedef" title="Typedef">typedef</a> <code>double_t</code> can be used for code that is portable under all <code>FLT_EVAL_METHOD</code>s).</li> <li>The main function to be evaluated. Although it appears that some arguments to this continued fraction, e.g., 3.0, would lead to a divide-by-zero error, in fact the function is well-defined at 3.0 and division by 0 will simply return a +infinity that will then correctly lead to a finite result: IEEE 754 is defined not to trap on such exceptions by default and is designed so that they can very often be ignored, as in this case. (If <code>FLT_EVAL_METHOD</code> is defined as 2 then all internal computations including constants will be performed in long double precision; if <code>FLT_EVAL_METHOD</code> is defined as 0 then additional care is need to ensure this, including possibly additional casts and explicit specification of constants as long double.)</li> <li>As the raised divide-by-zero flag is not an error in this case, it can simply be dismissed to clear the flag for use by later code.</li> <li>In some cases, other exceptions may be regarded as an error, such as overflow (although it can in fact be shown that this cannot occur in this case).</li> <li><code>__STDC_IEC_559__</code> is to be defined only if "Annex F IEC 60559 floating-point arithmetic" is fully implemented by the compiler and the C library (users should be aware that this macro is sometimes defined while it should not be).</li> <li>The default rounding mode is round to nearest (with the even rounding rule in the halfway cases) for IEEE 754, but explicitly setting the rounding mode toward + and - infinity (by defining <code>TEST_NUMERIC_STABILITY_UP</code> etc. in this example, when debugging) can be used to diagnose numerical instability.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> This method can be used even if <code>compute_fn()</code> is part of a separately compiled binary library. But depending on the function, numerical instabilities cannot always be detected.</li></ol> <div class="mw-heading mw-heading2"><h2 id="Version_detection">Version detection</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=5" title="Edit section: Version detection"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A standard macro <code>__STDC_VERSION__</code> is defined with value <code>199901L</code> to indicate that C99 support is available. As with the <code>__STDC__</code> macro for C90, <code>__STDC_VERSION__</code> can be used to write code that will compile differently for C90 and C99 compilers, as in this example that ensures that <code>inline</code> is available in either case (by replacing it with <code>static</code> in C90 to avoid linker errors). </p> <div class="mw-highlight mw-highlight-lang-c mw-content-ltr" dir="ltr"><pre><span></span><span class="cp">#if __STDC_VERSION__ >= 199901L</span> <span class="w"> </span><span class="cm">/* "inline" is a keyword */</span> <span class="cp">#else</span> <span class="cp"># define inline static</span> <span class="cp">#endif</span> </pre></div> <div class="mw-heading mw-heading2"><h2 id="Implementations">Implementations</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=6" title="Edit section: Implementations"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Most C compilers provide support for at least some of the features introduced in C99. </p><p>Historically, <a href="/wiki/Microsoft" title="Microsoft">Microsoft</a> has been slow to implement new C features in their <a href="/wiki/Visual_C%2B%2B" class="mw-redirect" title="Visual C++">Visual C++</a> tools, instead focusing mainly on supporting developments in the C++ standards.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> However, with the introduction of Visual C++ 2013 Microsoft implemented a limited subset of C99, which was expanded in Visual C++ 2015.<sup id="cite_ref-vs2015_new_14-0" class="reference"><a href="#cite_note-vs2015_new-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable sortable collapsible collapsed"> <tbody><tr> <th>Compiler </th> <th>Level of support </th> <th>C99 compatibility details </th></tr> <tr> <td><a href="/wiki/Acorn_C/C%2B%2B" title="Acorn C/C++">Acorn C/C++</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>The official documentation states that "most" compiler features are supported, along with "some" of the library functions. </td></tr> <tr> <td>AMD x86 <a href="/wiki/Open64" title="Open64"> Open64 Compiler Suite</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Mostly </td> <td>Has C99 support equal to that of GCC.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Cc65" title="Cc65">cc65</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Full <a href="/wiki/C89_(C_version)" class="mw-redirect" title="C89 (C version)">C89</a> and C99 support is not implemented, partly due to platform limitations (<a href="/wiki/MOS_Technology_6502" title="MOS Technology 6502">MOS Technology 6502</a>). There is no support planned for some C99 types like _Complex and 64-bit integers (long long).<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Ch_(computer_programming)" title="Ch (computer programming)">Ch</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Supports major C99 features.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Clang" title="Clang">Clang</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Mostly </td> <td>Supports all features except C99 floating-point pragmas.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/CompCert" title="CompCert">CompCert</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Mostly </td> <td>A certified compiler, formally proved correct. Supports all features except C99 complex numbers and VLA, and minor restrictions on switch statements (no <a href="/wiki/Duff%27s_device" title="Duff's device">Duff's device</a>).<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td>cparser </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td>Supports C99 features.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/C%2B%2B_Builder" class="mw-redirect" title="C++ Builder">C++ Builder</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Only in 64-bit mode, since latter is CLang fork<br /><sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (September 2011)">citation needed</span></a></i>]</sup> </td> <td> </td></tr> <tr> <td><a href="/wiki/Digital_Mars" title="Digital Mars">Digital Mars C/C++ Compiler</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Lacks support for some features, such as <<a href="/wiki/Tgmath.h" class="mw-redirect" title="Tgmath.h">tgmath.h</a>> and _Pragma.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">GCC</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Mostly </td> <td>As of July 2021<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=C99&action=edit">[update]</a></sup>, standard pragmas and IEEE 754/IEC 60559 floating-point support are missing in mainline GCC. Additionally, some features (such as extended integer types and new library functions) must be provided by the C standard library and are out of scope for GCC.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> GCC's 4.6 and 4.7 releases also provide the same level of compliance.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> Partial IEEE 754 support, even when the hardware is compliant: some compiler options may be needed to avoid incorrect optimizations (e.g., <code>-std=c99</code> and <code>-fsignaling-nans</code>), but full support of directed rounding modes is missing even when <code>-frounding-math</code> is used.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Green_Hills_Software" title="Green Hills Software">Green Hills Software</a> </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td> </td></tr> <tr> <td>IBM C for AIX, V6 <sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> and <a href="/wiki/IBM_XL_C%2B%2B" class="mw-redirect" title="IBM XL C++">XL C/C++</a> V11.1 for AIX <sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td> </td></tr> <tr> <td><a href="/wiki/IBM_Rational" class="mw-redirect" title="IBM Rational">IBM Rational</a> logiscope </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td>Until Logiscope 6.3, only basic constructs of C99 were supported. C99 is officially supported in Logiscope 6.4 and later versions.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/The_Portland_Group" title="The Portland Group">The Portland Group</a> PGI C/C++ </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td> </td></tr> <tr> <td><a href="/wiki/IAR_Systems" title="IAR Systems">IAR Systems</a><br /> Embedded Workbench </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Mostly </td> <td>Does not support UCN (universal character names). Compiler for embedded targets, such as ARM, Coldfire, MSP430, AVR, AVR32, 8051, ... No x86 targets. </td></tr> <tr> <td><a href="/wiki/Intel_C%2B%2B_compiler" class="mw-redirect" title="Intel C++ compiler">Intel C++ compiler</a> </td> <td style="background: #FFD; color:black; vertical-align: middle; text-align: center;" class="partial table-partial">Mostly<br /><sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (February 2015)">citation needed</span></a></i>]</sup> </td> <td> </td></tr> <tr> <td><a href="/wiki/Microsoft_Visual_C%2B%2B" title="Microsoft Visual C++">Microsoft Visual C++</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial<sup id="cite_ref-vs2015_new_14-1" class="reference"><a href="#cite_note-vs2015_new-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </td> <td>Visual C++ 2012 and earlier did not support C99.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> <br />Visual C++ 2013 implements a limited subset of C99 required to compile popular open-source projects.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup><br />Visual C++ 2015 implements the C99 standard library, with the exception of any library features that depend on compiler features not yet supported by the compiler (for example, <<a href="/wiki/C_mathematical_functions#tgmath.h" title="C mathematical functions">tgmath.h</a>> is not implemented).<sup id="cite_ref-vs2015_new_14-2" class="reference"><a href="#cite_note-vs2015_new-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup><br />Visual C++ 2019 (16.6) adds opt-in support for a C99 conformant preprocessor.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Open_Watcom" class="mw-redirect" title="Open Watcom">Open Watcom</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Implements the most commonly used parts of the standard. However, they are enabled only through the undocumented command-line switch "-za99". Three C99 features have been bundled as C90 extensions since pre-v1.0: C++ style comments (//), flexible array members, trailing comma allowed in enum declaration.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/w/index.php?title=Pelles_C&action=edit&redlink=1" class="new" title="Pelles C (page does not exist)">Pelles C</a> </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full </td> <td>Supports all C99 features.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Portable_C_compiler" class="mw-redirect" title="Portable C compiler">Portable C compiler</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Working towards becoming C99-compliant.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (April 2012)">citation needed</span></a></i>]</sup> </td></tr> <tr> <td><a href="/wiki/Sun_Studio_(software)" class="mw-redirect" title="Sun Studio (software)">Sun Studio</a> </td> <td style="background:#9EFF9E;color:black;vertical-align:middle;text-align:center;" class="table-yes">Full<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> </td> <td> </td></tr> <tr> <td>The <a href="/wiki/Amsterdam_Compiler_Kit" title="Amsterdam Compiler Kit">Amsterdam Compiler Kit</a> </td> <td style="background:#FFC7C7;color:black;vertical-align:middle;text-align:center;" class="table-no">No<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (August 2015)">citation needed</span></a></i>]</sup> </td> <td>A C99 frontend is currently under investigation.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (August 2015)">citation needed</span></a></i>]</sup> </td></tr> <tr> <td><a href="/wiki/Tiny_C_Compiler" title="Tiny C Compiler">Tiny C Compiler</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td>Does not support complex numbers.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> Variable Length Arrays are supported but not as arguments in functions<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (March 2016)">citation needed</span></a></i>]</sup>. The developers state that "TCC is heading toward full ISOC99 compliance".<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">[</span>40<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Vbcc" title="Vbcc">vbcc</a> </td> <td style="background:#FFB; color:black;vertical-align:middle;text-align:center;" class="table-partial">Partial </td> <td> </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Future_work">Future work</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=7" title="Edit section: Future work"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Since ratification of the 1999 C standard, the standards working group prepared technical reports specifying improved support for embedded processing, additional character data types (<a href="/wiki/Unicode" title="Unicode">Unicode</a> support), and library functions with improved <a href="/wiki/Bounds_checking" title="Bounds checking">bounds checking</a>. Work continues on technical reports addressing decimal <a href="/wiki/Floating_point" class="mw-redirect" title="Floating point">floating point</a>, additional mathematical <a href="/wiki/Special_functions" title="Special functions">special functions</a>, and additional <a href="/wiki/Dynamic_memory_allocation" class="mw-redirect" title="Dynamic memory allocation">dynamic memory allocation</a> functions. The C and C++ standards committees have been collaborating on specifications for <a href="/wiki/Thread_(computer_programming)" class="mw-redirect" title="Thread (computer programming)">threaded</a> programming. </p><p>The next revision of the C standard, <a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a>, was ratified in 2011.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">[</span>41<span class="cite-bracket">]</span></a></sup> The C standards committee adopted guidelines that limited the adoption of new features that have not been tested by existing implementations. Much effort went into developing a <a href="/wiki/Memory_model_(programming)" title="Memory model (programming)">memory model</a>, in order to clarify <a href="/wiki/Sequence_point" title="Sequence point">sequence points</a> and to support <a href="/wiki/Thread_(computer_programming)" class="mw-redirect" title="Thread (computer programming)">threaded</a> programming. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=8" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1266661725">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid 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href="/wiki/Compatibility_of_C_and_C%2B%2B" title="Compatibility of C and C++">Compatibility of C and C++</a></li> <li><a href="/wiki/C%2B%2B_Technical_Report_1" title="C++ Technical Report 1">C++ Technical Report 1</a></li> <li><a href="/wiki/Floating_point" class="mw-redirect" title="Floating point">Floating point</a>, for further discussion of usage of IEEE 754 hardware</li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=9" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output 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a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.iso.org/iso/iso_catalogue/catalogue_ics/catalogue_detail_ics.htm?csnumber=29237">"ISO/IEC 9899:1999 - Programming languages - C"</a>. Iso.org. 8 December 2011<span class="reference-accessdate">. Retrieved <span class="nowrap">8 April</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=ISO%2FIEC+9899%3A1999+-+Programming+languages+-+C&rft.pub=Iso.org&rft.date=2011-12-08&rft_id=https%3A%2F%2Fwww.iso.org%2Fiso%2Fiso_catalogue%2Fcatalogue_ics%2Fcatalogue_detail_ics.htm%3Fcsnumber%3D29237&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-grouper.ieee.org-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-grouper.ieee.org_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-grouper.ieee.org_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20171028003206/http://grouper.ieee.org/groups/754/meeting-materials/2001-07-18-c99.pdf">"IEEE 754 Support in C99"</a> <span class="cs1-format">(PDF)</span>. <i><a href="/wiki/IEEE" class="mw-redirect" title="IEEE">IEEE</a></i>. Archived from <a rel="nofollow" class="external text" href="https://grouper.ieee.org/groups/754/meeting-materials/2001-07-18-c99.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 28 October 2017<span class="reference-accessdate">. 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Retrieved <span class="nowrap">31 January</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=IBM+-+XL+C%2FC%2B%2B+for+AIX&rft_id=https%3A%2F%2Fwww-01.ibm.com%2Fsoftware%2Fawdtools%2Fxlcpp%2Faix%2Ffeatures%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-28">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www-01.ibm.com/support/docview.wss?uid=swg21408170">"IBM Rational Logiscope support for C99 standard - United States"</a>. 24 February 2012<span class="reference-accessdate">. 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Retrieved <span class="nowrap">31 January</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Sutter%E2%80%99s+Mill&rft.atitle=Reader+Q%26A%3A+What+about+VC%2B%2B+and+C99%3F&rft.date=2012-05-03&rft_id=http%3A%2F%2Fherbsutter.com%2F2012%2F05%2F03%2Freader-qa-what-about-vc-and-c99%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-30"><span class="mw-cite-backlink"><b><a href="#cite_ref-30">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://msdn.microsoft.com/en-us/library/zb1574zs%28v=VS.100%29.aspx">"A.27 Use of C99 Variable Length Arrays"</a>. Microsoft<span class="reference-accessdate">. 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Archived from <a rel="nofollow" class="external text" href="https://openwatcom.org/index.php/C99_Compliance">the original</a> on 3 May 2015<span class="reference-accessdate">. Retrieved <span class="nowrap">25 September</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=C99+compliance+in+Open+Watcom&rft_id=https%3A%2F%2Fopenwatcom.org%2Findex.php%2FC99_Compliance&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-36"><span class="mw-cite-backlink"><b><a href="#cite_ref-36">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20220313113801/http://smorgasbordet.com/pellesc/">"Pelles C Overview"</a>. January 2013. Archived from <a rel="nofollow" class="external text" href="https://www.smorgasbordet.com/pellesc/">the original</a> on 13 March 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">2 March</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Pelles+C+Overview&rft.date=2013-01&rft_id=https%3A%2F%2Fwww.smorgasbordet.com%2Fpellesc%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-37"><span class="mw-cite-backlink"><b><a href="#cite_ref-37">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://docs.oracle.com/cd/E19205-01/820-4155/c.html#about">"Sun Studio 12: C Compiler 5.9 Readme"</a>. Sun Microsystems, Inc. 31 May 2007<span class="reference-accessdate">. Retrieved <span class="nowrap">23 September</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Sun+Studio+12%3A+C+Compiler+5.9+Readme&rft.pub=Sun+Microsystems%2C+Inc.&rft.date=2007-05-31&rft_id=https%3A%2F%2Fdocs.oracle.com%2Fcd%2FE19205-01%2F820-4155%2Fc.html%23about&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-38"><span class="mw-cite-backlink"><b><a href="#cite_ref-38">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://bellard.org/tcc/tcc-doc.html#SEC7">"Tiny C Compiler Reference Documentation"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">31 January</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Tiny+C+Compiler+Reference+Documentation&rft_id=https%3A%2F%2Fbellard.org%2Ftcc%2Ftcc-doc.html%23SEC7&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-39">^</a></b></span> <span class="reference-text">According to the project's <a rel="nofollow" class="external text" href="https://repo.or.cz/w/tinycc.git/blob/HEAD:/TODO">TODO list</a> complex types are the only missing C99 feature. Variable Length Arrays have been added in TCC 0.9.26 <a rel="nofollow" class="external autonumber" href="https://bellard.org/tcc/">[1]</a></span> </li> <li id="cite_note-40"><span class="mw-cite-backlink"><b><a href="#cite_ref-40">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://bellard.org/tcc/">"TCC : Tiny C Compiler"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">31 January</span> 2016</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=TCC+%3A+Tiny+C+Compiler&rft_id=https%3A%2F%2Fbellard.org%2Ftcc%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> <li id="cite_note-41"><span class="mw-cite-backlink"><b><a href="#cite_ref-41">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://gcc.gnu.org/onlinedocs/gcc/Standards.html">"Standards - Using the GNU Compiler Collection (GCC)"</a>. Gcc.gnu.org<span class="reference-accessdate">. Retrieved <span class="nowrap">8 April</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Standards+-+Using+the+GNU+Compiler+Collection+%28GCC%29&rft.pub=Gcc.gnu.org&rft_id=https%3A%2F%2Fgcc.gnu.org%2Fonlinedocs%2Fgcc%2FStandards.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=10" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf">N1256</a> (final draft of C99 standard plus TC1, TC2, TC3); WG14; 2007. (<a rel="nofollow" class="external text" href="https://port70.net/~nsz/c/c99/">HTML and ASCII versions</a>)</li> <li><a rel="nofollow" class="external text" href="https://www.iso.org/standard/29237.html">ISO/IEC 9899:1999</a> (official C99 standard); <a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">ISO</a>; 1999.</li> <li><a rel="nofollow" class="external text" href="https://www.open-std.org/jtc1/sc22/wg14/www/C99RationaleV5.10.pdf">Rationale for C99</a>; WG14; 2003.</li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFCheng2002" class="citation journal cs1">Cheng, Harry (1 March 2002). <a rel="nofollow" class="external text" href="https://drdobbs.com/cpp/184404993">"C99 & Numeric computing"</a>. <i><a href="/wiki/Dr._Dobb%27s_Journal" title="Dr. Dobb's Journal">Dr. Dobb's Journal</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Dr.+Dobb%27s+Journal&rft.atitle=C99+%26+Numeric+computing&rft.date=2002-03-01&rft.aulast=Cheng&rft.aufirst=Harry&rft_id=https%3A%2F%2Fdrdobbs.com%2Fcpp%2F184404993&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFSeebach2004" class="citation web cs1">Seebach, Peter (24 March 2004). <a rel="nofollow" class="external text" href="https://www.ibm.com/developerworks/library/l-c99.html">"Open source development using C99"</a>. <i>developerWorks</i>. <a href="/wiki/IBM" title="IBM">IBM</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=developerWorks&rft.atitle=Open+source+development+using+C99&rft.date=2004-03-24&rft.aulast=Seebach&rft.aufirst=Peter&rft_id=https%3A%2F%2Fwww.ibm.com%2Fdeveloperworks%2Flibrary%2Fl-c99.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AC99" class="Z3988"></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=C99&action=edit&section=11" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://www.open-std.org/jtc1/sc22/wg14/www/wg14_document_log.htm">C Language Working Group 14 (WG14) Documents</a></li> <li><a rel="nofollow" class="external text" href="https://www.open-std.org/jtc1/sc22/wg14/www/docs/historic/n444.htm">C9X Charter</a> - WG14</li> <li><a rel="nofollow" class="external text" href="https://www.open-std.org/jtc1/sc22/wg14/www/newinc9x.htm">New things in C9X</a></li> <li><a rel="nofollow" class="external text" href="https://www.cplusplus.com/articles/iz3hAqkS/">Features of C99</a></li></ul> <table class="wikitable succession-box noprint" style="margin:0.5em auto; font-size:small;clear:both;"> <tbody><tr style="text-align:center;"> <td style="width:30%;" rowspan="1">Preceded by<div style="font-weight: bold"><a href="/wiki/C89_(C_version)" class="mw-redirect" title="C89 (C version)">C89 / C90 / "ANSI C"</a></div> </td> <td style="width: 40%; text-align: center;" rowspan="1"><b> <a href="/wiki/C_(programming_language)" title="C (programming language)">C language</a> standards </b> </td> <td style="width: 30%; text-align: center;" rowspan="1">Succeeded by<div style="font-weight: bold"><a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a></div> </td></tr> </tbody></table> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output 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.navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="C_programming_language527" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:C_programming_language" title="Template:C programming language"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:C_programming_language" title="Template talk:C programming language"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:C_programming_language" title="Special:EditPage/Template:C programming language"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="C_programming_language527" style="font-size:114%;margin:0 4em"><a href="/wiki/C_(programming_language)" title="C (programming language)">C programming language</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/ANSI_C" title="ANSI C">ANSI C</a></li> <li><a class="mw-selflink selflink">C99</a></li> <li><a href="/wiki/C11_(C_standard_revision)" title="C11 (C standard revision)">C11</a></li> <li><a href="/wiki/C17_(C_standard_revision)" title="C17 (C standard revision)">C17</a></li> <li><a href="/wiki/C23_(C_standard_revision)" title="C23 (C standard revision)">C23</a></li> <li><a href="/wiki/Embedded_C" title="Embedded C">Embedded C</a></li> <li><a href="/wiki/MISRA_C" title="MISRA C">MISRA C</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Features</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Subroutine" class="mw-redirect" title="Subroutine">Functions</a></li> <li><a href="/wiki/Include_directive#C" title="Include directive">Header files</a></li> <li><a href="/wiki/Operators_in_C_and_C%2B%2B" title="Operators in C and C++">Operators</a></li> <li><a href="/wiki/C_string_handling" title="C string handling">String</a></li> <li><a href="/wiki/C_syntax" title="C syntax">Syntax</a></li> <li><a href="/wiki/C_preprocessor" title="C preprocessor">Preprocessor</a></li> <li><a href="/wiki/C_data_types" title="C data types">Data types</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/C_standard_library" title="C standard library">Standard library</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/C_character_classification" title="C character classification">Char</a></li> <li><a href="/wiki/C_file_input/output" title="C file input/output">File I/O</a></li> <li><a href="/wiki/C_mathematical_functions" title="C mathematical functions">Math</a></li> <li><a href="/wiki/C_dynamic_memory_allocation" title="C dynamic memory allocation">Dynamic memory</a></li> <li><a href="/wiki/C_string_handling" title="C string handling">String</a></li> <li><a href="/wiki/C_date_and_time_functions" title="C date and time functions">Time</a></li> <li><a href="/wiki/Stdarg.h" title="Stdarg.h">Variadic</a></li> <li><a href="/wiki/C_POSIX_library" title="C POSIX library">POSIX</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Implementations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bionic_(software)" title="Bionic (software)">Bionic</a> <ul><li><a href="/wiki/Hybris_(software)" class="mw-redirect" title="Hybris (software)">libhybris</a></li></ul></li> <li><a href="/wiki/Dietlibc" title="Dietlibc">dietlibc</a></li> <li><a href="/wiki/Glibc" title="Glibc">glibc</a> <ul><li><a href="/wiki/Embedded_GLIBC" class="mw-redirect" title="Embedded GLIBC">EGLIBC</a></li></ul></li> <li><a href="/wiki/Klibc" title="Klibc">klibc</a></li> <li><a href="/wiki/Microsoft_Windows_library_files" title="Microsoft Windows library files">Windows CRT</a></li> <li><a href="/wiki/Musl" title="Musl">musl</a></li> <li><a href="/wiki/Newlib" title="Newlib">Newlib</a></li> <li><a href="/wiki/UClibc" title="UClibc">uClibc</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_C_compilers" class="mw-redirect" title="List of C compilers">Compilers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Amsterdam_Compiler_Kit" title="Amsterdam Compiler Kit">ACK</a></li> <li><a href="/wiki/Borland_Turbo_C" class="mw-redirect" title="Borland Turbo C">Borland Turbo C</a></li> <li><a href="/wiki/Clang" title="Clang">Clang</a></li> <li><a href="/wiki/GNU_Compiler_Collection" title="GNU Compiler Collection">GCC</a></li> <li><a href="/wiki/Intel_C%2B%2B_Compiler" title="Intel C++ Compiler">ICC</a></li> <li><a href="/wiki/LCC_(compiler)" title="LCC (compiler)">LCC</a></li> <li><a href="/wiki/Norcroft_C_compiler" title="Norcroft C compiler">Norcroft C</a></li> <li><a href="/wiki/Portable_C_Compiler" title="Portable C Compiler">PCC</a></li> <li><a href="/wiki/Small_Device_C_Compiler" title="Small Device C Compiler">SDCC</a></li> <li><a href="/wiki/Tiny_C_Compiler" title="Tiny C Compiler">TCC</a></li> <li><a href="/wiki/Visual_Studio" title="Visual Studio">Visual Studio</a>, <a href="/wiki/Microsoft_Visual_Studio_Express" title="Microsoft Visual Studio Express">Express</a>, <a href="/wiki/Microsoft_Visual_C%2B%2B" title="Microsoft Visual C++">C++</a></li> <li><a href="/wiki/Watcom_C/C%2B%2B" title="Watcom C/C++">Watcom C/C++</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Integrated_development_environment" title="Integrated development environment">IDEs</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anjuta" title="Anjuta">Anjuta</a></li> <li><a href="/wiki/CLion" class="mw-redirect" title="CLion">CLion</a></li> <li><a href="/wiki/Code::Blocks" title="Code::Blocks">Code::Blocks</a></li> <li><a href="/wiki/CodeLite" title="CodeLite">CodeLite</a></li> <li><a href="/wiki/Eclipse_(software)" title="Eclipse (software)">Eclipse</a></li> <li><a href="/wiki/Geany" title="Geany">Geany</a></li> <li><a href="/wiki/GNOME_Builder" title="GNOME Builder">GNOME Builder</a></li> <li><a href="/wiki/KDevelop" title="KDevelop">KDevelop</a></li> <li><a href="/wiki/Visual_Studio" title="Visual Studio">Visual Studio</a></li> <li><a href="/wiki/NetBeans" title="NetBeans">NetBeans</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Comparison with<br />other languages</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Compatibility_of_C_and_C%2B%2B" title="Compatibility of C and C++">Compatibility of C and C++</a></li> <li><a href="/wiki/Comparison_of_Pascal_and_C" title="Comparison of Pascal and C">Comparison with Pascal</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Descendant<br />languages</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/C%2B%2B" title="C++">C++</a></li> <li><a href="/wiki/C_Sharp_(programming_language)" title="C Sharp (programming language)">C#</a></li> <li><a href="/wiki/D_(programming_language)" title="D (programming language)">D</a></li> <li><a href="/wiki/Objective-C" title="Objective-C">Objective-C</a></li> <li><a href="/wiki/Alef_(programming_language)" title="Alef (programming language)">Alef</a></li> <li><a href="/wiki/Limbo_(programming_language)" title="Limbo (programming language)">Limbo</a></li> <li><a href="/wiki/Go_(programming_language)" title="Go (programming language)">Go</a></li> <li><a href="/wiki/Vala_(programming_language)" title="Vala (programming language)">Vala</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Designer</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Dennis_Ritchie" title="Dennis Ritchie">Dennis Ritchie</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:C_(programming_language)" title="Category:C (programming language)">Category</a></b></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="International_Organization_for_Standardization_(ISO)_standards364" style="padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:ISO_standards" title="Template:ISO standards"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:ISO_standards" title="Template talk:ISO standards"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:ISO_standards" title="Special:EditPage/Template:ISO standards"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="International_Organization_for_Standardization_(ISO)_standards364" style="font-size:114%;margin:0 4em"><a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">International Organization for Standardization</a> (ISO) standards</div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div>List of <a href="/wiki/List_of_ISO_standards" title="List of ISO standards">ISO standards</a> – <a href="/wiki/List_of_ISO_romanizations" title="List of ISO romanizations">ISO romanizations</a> – <a href="/wiki/List_of_IEC_standards" title="List of IEC standards">IEC standards</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">1–9999</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ISO_1" title="ISO 1">1</a></li> <li><a href="/wiki/ISO_2" title="ISO 2">2</a></li> <li><a href="/wiki/Renard_series" title="Renard series">3</a></li> <li><a href="/wiki/ISO_4" title="ISO 4">4</a></li> <li><a href="/wiki/Film_speed" title="Film speed">6</a></li> <li><a href="/wiki/British_Standard_Pipe" title="British Standard Pipe">7</a></li> <li><a href="/wiki/ISO_9" title="ISO 9">9</a></li> <li><a href="/wiki/A440_(pitch_standard)" title="A440 (pitch standard)">16</a></li> <li><a href="/wiki/Renard_series" title="Renard series">17</a></li> <li><a href="/wiki/ISO_31" title="ISO 31">31</a> <ul><li><a href="/wiki/ISO_31-0" title="ISO 31-0">-0</a></li> <li><a href="/wiki/ISO_31-1" title="ISO 31-1">-1</a></li> <li><a href="/wiki/ISO_31-3" title="ISO 31-3">-3</a></li> <li><a href="/wiki/ISO_31-4" title="ISO 31-4">-4</a></li> <li><a href="/wiki/ISO_31-5" title="ISO 31-5">-5</a></li> <li><a href="/wiki/ISO_31-6" title="ISO 31-6">-6</a></li> <li><a href="/wiki/ISO_31-7" title="ISO 31-7">-7</a></li> <li><a href="/wiki/ISO_31-8" title="ISO 31-8">-8</a></li> <li><a href="/wiki/ISO_31-9" class="mw-redirect" title="ISO 31-9">-9</a></li> <li><a href="/wiki/ISO_31-10" title="ISO 31-10">-10</a></li> <li><a href="/wiki/ISO_31-11" title="ISO 31-11">-11</a></li> <li><a href="/wiki/ISO_31-12" class="mw-redirect" title="ISO 31-12">-12</a></li> <li><a href="/wiki/ISO_31-13" class="mw-redirect" title="ISO 31-13">-13</a></li></ul></li> <li><a href="/wiki/ISO_metric_screw_thread" title="ISO metric screw thread">68-1</a></li> <li><a href="/wiki/ISO_128" title="ISO 128">128</a></li> <li><a href="/wiki/ISO_216" title="ISO 216">216</a></li> <li><a href="/wiki/ISO_217" title="ISO 217">217</a></li> <li><a href="/wiki/Equal-loudness_contour" title="Equal-loudness contour">226</a></li> <li><a href="/wiki/British_Standard_Pipe" title="British Standard Pipe">228</a></li> <li><a href="/wiki/ISO_233" title="ISO 233">233</a></li> <li><a href="/wiki/ISO_259" title="ISO 259">259</a></li> <li><a href="/wiki/ISO_metric_screw_thread" title="ISO metric screw thread">261</a></li> <li><a href="/wiki/ISO_metric_screw_thread" title="ISO metric screw thread">262</a></li> <li><a href="/wiki/Kappa_number" title="Kappa number">302</a></li> <li><a href="/wiki/Vicat_softening_point" title="Vicat softening point">306</a></li> <li><a href="/wiki/Hazard_symbol#Ionizing_radiation_symbol" title="Hazard symbol">361</a></li> <li><a href="/wiki/Power_take-off" title="Power take-off">500</a></li> <li><a href="/wiki/Hot_shoe" title="Hot shoe">518</a></li> <li><a href="/wiki/Prontor-Compur" title="Prontor-Compur">519</a></li> <li><a href="/wiki/ISO_639" title="ISO 639">639</a> <ul><li><a href="/wiki/ISO_639-1" title="ISO 639-1">-1</a></li> <li><a href="/wiki/ISO_639-2" title="ISO 639-2">-2</a></li> <li><a href="/wiki/ISO_639-3" title="ISO 639-3">-3</a></li> <li><a href="/wiki/ISO_639-5" title="ISO 639-5">-5</a></li> <li><a href="/wiki/ISO_639-6" title="ISO 639-6">-6</a></li></ul></li> <li><a href="/wiki/ISO/IEC_646" title="ISO/IEC 646">646</a></li> <li><a href="/wiki/ISO_657" title="ISO 657">657</a></li> <li><a href="/wiki/ISO_668" title="ISO 668">668</a></li> <li><a href="/wiki/ISO_690" title="ISO 690">690</a></li> <li><a href="/wiki/ISO_704" title="ISO 704">704</a></li> <li><a href="/wiki/ISO_732" title="ISO 732">732</a></li> <li><a href="/wiki/Antimagnetic_watch" title="Antimagnetic watch">764</a></li> <li><a href="/wiki/Hole_punch" title="Hole punch">838</a></li> <li><a href="/wiki/ISO_843" title="ISO 843">843</a></li> <li><a href="/wiki/ISO_860" title="ISO 860">860</a></li> <li><a href="/wiki/ISO_898" title="ISO 898">898</a></li> <li><a href="/wiki/ISO_965" title="ISO 965">965</a></li> <li><a href="/wiki/ISO_999" title="ISO 999">999</a></li> <li><a href="/wiki/ISO_1000" title="ISO 1000">1000</a></li> <li><a href="/wiki/Magnetic_ink_character_recognition" title="Magnetic ink character recognition">1004</a></li> <li><a href="/wiki/135_film" title="135 film">1007</a></li> <li><a href="/wiki/OCR-A" title="OCR-A">1073-1</a></li> <li><a href="/wiki/OCR-B" title="OCR-B">1073-2</a></li> <li><a href="/wiki/Longitudinal_redundancy_check" title="Longitudinal redundancy check">1155</a></li> <li><a href="/wiki/Shock-resistant_watch#ISO_1413_shock-resistant_standard" title="Shock-resistant watch">1413</a></li> <li><a href="/wiki/ALGOL_60" title="ALGOL 60">1538</a></li> <li><a href="/wiki/ISO_1629" title="ISO 1629">1629</a></li> <li><a href="/wiki/ISO_1745" title="ISO 1745">1745</a></li> <li><a href="/wiki/COBOL" title="COBOL">1989</a></li> <li><a href="/wiki/ISO_2014" title="ISO 2014">2014</a></li> <li><a href="/wiki/ISO_2015" title="ISO 2015">2015</a></li> <li><a href="/wiki/ISO/IEC_2022" title="ISO/IEC 2022">2022</a></li> <li><a href="/wiki/ISO_2033" title="ISO 2033">2033</a></li> <li><a href="/wiki/ISO_2047" title="ISO 2047">2047</a></li> <li><a href="/wiki/ISBN" title="ISBN">2108</a></li> <li><a href="/wiki/ISO_2145" title="ISO 2145">2145</a></li> <li><a href="/wiki/ISO_2146" title="ISO 2146">2146</a></li> <li><a href="/wiki/Film_speed" title="Film speed">2240</a></li> <li><a href="/wiki/Water_Resistant_mark" title="Water Resistant mark">2281</a></li> <li><a href="/wiki/International_Standard_Atmosphere" title="International Standard Atmosphere">2533</a></li> <li><a href="/wiki/ISO_2709" title="ISO 2709">2709</a></li> <li><a href="/wiki/ISO_2711" title="ISO 2711">2711</a></li> <li><a href="/wiki/Film_speed" title="Film speed">2720</a></li> <li><a href="/wiki/ISO_2788" title="ISO 2788">2788</a></li> <li><a href="/wiki/ISO_2848" title="ISO 2848">2848</a></li> <li><a href="/wiki/ISO_2852" title="ISO 2852">2852</a></li> <li><a href="/wiki/ISO_2921" title="ISO 2921">2921</a></li> <li><a href="/wiki/126_film" title="126 film">3029</a></li> <li><a href="/wiki/ISO_3103" title="ISO 3103">3103</a></li> <li><a href="/wiki/ISO_3166" title="ISO 3166">3166</a> <ul><li><a href="/wiki/ISO_3166-1" title="ISO 3166-1">-1</a></li> <li><a href="/wiki/ISO_3166-2" title="ISO 3166-2">-2</a></li> <li><a href="/wiki/ISO_3166-3" title="ISO 3166-3">-3</a></li></ul></li> <li><a href="/wiki/ISSN" title="ISSN">3297</a></li> <li><a href="/wiki/ISO_3307" title="ISO 3307">3307</a></li> <li><a href="/wiki/O-ring" title="O-ring">3601</a></li> <li><a href="/wiki/Kunrei-shiki_romanization" title="Kunrei-shiki romanization">3602</a></li> <li><a href="/wiki/ISO_3864" title="ISO 3864">3864</a></li> <li><a href="/wiki/International_Standard_Recording_Code" title="International Standard Recording Code">3901</a></li> <li><a href="/wiki/FDI_World_Dental_Federation_notation" title="FDI World Dental Federation notation">3950</a></li> <li><a href="/wiki/ISO_3977" title="ISO 3977">3977</a></li> <li><a href="/wiki/ISO_4031" title="ISO 4031">4031</a></li> <li><a href="/wiki/ISO_4157" class="mw-redirect" title="ISO 4157">4157</a></li> <li><a href="/wiki/ISO_4165" title="ISO 4165">4165</a></li> <li><a href="/wiki/ISO_4217" title="ISO 4217">4217</a></li> <li><a href="/wiki/ISO/IEC_4909" title="ISO/IEC 4909">4909</a></li> <li><a href="/wiki/ISO/IEC_5218" title="ISO/IEC 5218">5218</a></li> <li><a href="/wiki/ISO_5426" title="ISO 5426">5426</a></li> <li><a href="/wiki/ISO_5427" title="ISO 5427">5427</a></li> <li><a href="/wiki/ISO_5428" title="ISO 5428">5428</a></li> <li><a href="/wiki/Accuracy_and_precision" title="Accuracy and precision">5725</a></li> <li><a href="/wiki/ISO_5775" title="ISO 5775">5775</a></li> <li><a href="/wiki/ISO_5776" title="ISO 5776">5776</a></li> <li><a href="/wiki/Film_speed" title="Film speed">5800</a></li> <li><a href="/wiki/Flowchart" title="Flowchart">5807</a></li> <li><a href="/wiki/ISO_5964" title="ISO 5964">5964</a></li> <li><a href="/wiki/International_Securities_Identification_Number" title="International Securities Identification Number">6166</a></li> <li><a href="/wiki/ISO_6344" title="ISO 6344">6344</a></li> <li><a href="/wiki/ISO_6346" title="ISO 6346">6346</a></li> <li><a href="/wiki/Minimal_BASIC" title="Minimal BASIC">6373</a></li> <li><a href="/wiki/ISO_6385" title="ISO 6385">6385</a></li> <li><a href="/wiki/Water_Resistant_mark" title="Water Resistant mark">6425</a></li> <li><a href="/wiki/ANSI_escape_code" title="ANSI escape code">6429</a></li> <li><a href="/wiki/ISO_6438" title="ISO 6438">6438</a></li> <li><a href="/wiki/ISO/IEC_6523" title="ISO/IEC 6523">6523</a></li> <li><a href="/wiki/ISO_6709" title="ISO 6709">6709</a></li> <li><a href="/wiki/ISO_6943" title="ISO 6943">6943</a></li> <li><a href="/wiki/ISO_7001" title="ISO 7001">7001</a></li> <li><a href="/wiki/ISO_7002" title="ISO 7002">7002</a></li> <li><a href="/wiki/ISO_7010" title="ISO 7010">7010</a></li> <li><a href="/wiki/ISO_7027" title="ISO 7027">7027</a></li> <li><a href="/wiki/ISO/IEC_7064" title="ISO/IEC 7064">7064</a></li> <li><a href="/wiki/Pinyin" title="Pinyin">7098</a></li> <li><a href="/wiki/Pascal_(programming_language)" title="Pascal (programming language)">7185</a></li> <li><a href="/wiki/ISO_7200" title="ISO 7200">7200</a></li> <li><a href="/wiki/OSI_model" title="OSI model">7498</a> <ul><li><a href="/wiki/OSI_model" title="OSI model">-1</a></li></ul></li> <li><a href="/wiki/ISO_7637" title="ISO 7637">7637</a></li> <li><a href="/wiki/ISO_7736" title="ISO 7736">7736</a></li> <li><a href="/wiki/ISO/IEC_7810" title="ISO/IEC 7810">7810</a></li> <li><a href="/wiki/ISO/IEC_7811" title="ISO/IEC 7811">7811</a></li> <li><a href="/wiki/ISO/IEC_7812" title="ISO/IEC 7812">7812</a></li> <li><a href="/wiki/ISO/IEC_7813" title="ISO/IEC 7813">7813</a></li> <li><a href="/wiki/ISO/IEC_7816" title="ISO/IEC 7816">7816</a></li> <li><a href="/wiki/Graphical_Kernel_System" title="Graphical Kernel System">7942</a></li> <li><a href="/wiki/ISO_8000" title="ISO 8000">8000</a></li> <li><a href="/wiki/On-board_diagnostics" title="On-board diagnostics">8093</a></li> <li><a href="/wiki/ISO_8178" title="ISO 8178">8178</a></li> <li><a href="/wiki/Fuel_oil" title="Fuel oil">8217</a></li> <li><a href="/wiki/ISO_8373" class="mw-redirect" title="ISO 8373">8373</a></li> <li><a href="/wiki/ISO_8501-1" title="ISO 8501-1">8501-1</a></li> <li><a href="/wiki/FTAM" title="FTAM">8571</a></li> <li><a href="/wiki/ISO_8583" title="ISO 8583">8583</a></li> <li><a href="/wiki/ISO_8601" title="ISO 8601">8601</a></li> <li><a href="/wiki/Open_Document_Architecture" title="Open Document Architecture">8613</a></li> <li><a href="/wiki/Computer_Graphics_Metafile" title="Computer Graphics Metafile">8632</a></li> <li><a href="/wiki/Graphical_Kernel_System" title="Graphical Kernel System">8651</a></li> <li><a href="/wiki/ISO/IEC_8652" title="ISO/IEC 8652">8652</a></li> <li><a href="/wiki/ISO_8691" title="ISO 8691">8691</a></li> <li><a href="/wiki/Graphical_Kernel_System" title="Graphical Kernel System">8805/8806</a></li> <li><a href="/wiki/Language_of_Temporal_Ordering_Specification" title="Language of Temporal Ordering Specification">8807</a></li> <li><a href="/wiki/Automotive_fuse" title="Automotive fuse">8820-5</a></li> <li><a href="/wiki/ISO/IEC_8859" title="ISO/IEC 8859">8859</a> <ul><li><a href="/wiki/ISO/IEC_8859-1" title="ISO/IEC 8859-1">-1</a></li> <li><a href="/wiki/ISO/IEC_8859-2" title="ISO/IEC 8859-2">-2</a></li> <li><a href="/wiki/ISO/IEC_8859-3" title="ISO/IEC 8859-3">-3</a></li> <li><a href="/wiki/ISO/IEC_8859-4" title="ISO/IEC 8859-4">-4</a></li> <li><a href="/wiki/ISO/IEC_8859-5" title="ISO/IEC 8859-5">-5</a></li> <li><a href="/wiki/ISO/IEC_8859-6" title="ISO/IEC 8859-6">-6</a></li> <li><a href="/wiki/ISO/IEC_8859-7" title="ISO/IEC 8859-7">-7</a></li> <li><a href="/wiki/ISO/IEC_8859-8" title="ISO/IEC 8859-8">-8</a></li> <li><a href="/wiki/ISO-8859-8-I" title="ISO-8859-8-I">-8-I</a></li> <li><a href="/wiki/ISO/IEC_8859-9" title="ISO/IEC 8859-9">-9</a></li> <li><a href="/wiki/ISO/IEC_8859-10" title="ISO/IEC 8859-10">-10</a></li> <li><a href="/wiki/ISO/IEC_8859-11" title="ISO/IEC 8859-11">-11</a></li> <li><a href="/wiki/ISO/IEC_8859-12" class="mw-redirect" title="ISO/IEC 8859-12">-12</a></li> <li><a href="/wiki/ISO/IEC_8859-13" title="ISO/IEC 8859-13">-13</a></li> <li><a href="/wiki/ISO/IEC_8859-14" title="ISO/IEC 8859-14">-14</a></li> <li><a href="/wiki/ISO/IEC_8859-15" title="ISO/IEC 8859-15">-15</a></li> <li><a href="/wiki/ISO/IEC_8859-16" title="ISO/IEC 8859-16">-16</a></li></ul></li> <li><a href="/wiki/Standard_Generalized_Markup_Language" title="Standard Generalized Markup Language">8879</a></li> <li><a href="/wiki/ISO_9000_family" title="ISO 9000 family">9000/9001</a></li> <li><a href="/wiki/ASMO_449" title="ASMO 449">9036</a></li> <li><a href="/wiki/SQL" title="SQL">9075</a></li> <li><a href="/wiki/ISO/IEC_9126" title="ISO/IEC 9126">9126</a></li> <li><a href="/wiki/On-board_diagnostics" title="On-board diagnostics">9141</a></li> <li><a href="/wiki/Salt_spray_test" title="Salt spray test">9227</a></li> <li><a href="/wiki/ISO_9241" title="ISO 9241">9241</a></li> <li><a href="/wiki/File_Allocation_Table" title="File Allocation Table">9293</a></li> <li><a href="/wiki/Fiber_Distributed_Data_Interface" title="Fiber Distributed Data Interface">9314</a></li> <li><a href="/wiki/ISO_9362" title="ISO 9362">9362</a></li> <li><a href="/wiki/Shoe_size" title="Shoe size">9407</a></li> <li><a href="/wiki/CHILL" title="CHILL">9496</a></li> <li><a href="/wiki/Manufacturing_Message_Specification" title="Manufacturing Message Specification">9506</a></li> <li><a href="/wiki/ISO/IEC_9529" title="ISO/IEC 9529">9529</a></li> <li><a href="/wiki/ISO_9564" title="ISO 9564">9564</a></li> <li><a href="/wiki/PHIGS" title="PHIGS">9592/9593</a></li> <li><a href="/wiki/X.500" title="X.500">9594</a></li> <li><a href="/wiki/ISO_9660" title="ISO 9660">9660</a></li> <li><a href="/wiki/ISO/IEC_9797-1" title="ISO/IEC 9797-1">9797-1</a></li> <li><a href="/wiki/ISO_9897" title="ISO 9897">9897</a></li> <li><a href="/wiki/ANSI_C" title="ANSI C">9899</a></li> <li><a href="/wiki/POSIX" title="POSIX">9945</a></li> <li><a href="/wiki/Romanization_of_Georgian" title="Romanization of Georgian">9984</a></li> <li><a href="/wiki/Romanization_of_Armenian" title="Romanization of Armenian">9985</a></li> <li><a href="/wiki/ISO/IEC_9995" title="ISO/IEC 9995">9995</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">10000–19999</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ISO_10006" title="ISO 10006">10006</a></li> <li><a href="/wiki/ISO_10007" title="ISO 10007">10007</a></li> <li><a href="/wiki/ISO/IEC_10116" title="ISO/IEC 10116">10116</a></li> <li><a href="/wiki/Whirlpool_(hash_function)" title="Whirlpool (hash function)">10118-3</a></li> <li><a href="/wiki/ISO_10160" title="ISO 10160">10160</a></li> <li><a href="/wiki/ISO_10161" title="ISO 10161">10161</a></li> <li><a href="/wiki/Guidelines_for_the_Definition_of_Managed_Objects" title="Guidelines for the Definition of Managed Objects">10165</a></li> <li><a href="/wiki/Document_Style_Semantics_and_Specification_Language" title="Document Style Semantics and Specification Language">10179</a></li> <li><a href="/wiki/Pascal_(programming_language)#ISO/IEC_10206:1990_Extended_Pascal" title="Pascal (programming language)">10206</a></li> <li><a href="/wiki/ISO_10218" title="ISO 10218">10218</a></li> <li><a href="/wiki/Full_BASIC" title="Full BASIC">10279</a></li> <li><a href="/wiki/ISO_10303" title="ISO 10303">10303</a> <ul><li><a href="/wiki/EXPRESS_(data_modeling_language)" title="EXPRESS (data modeling language)">-11</a></li> <li><a href="/wiki/ISO_10303-21" title="ISO 10303-21">-21</a></li> <li><a href="/wiki/ISO_10303-22" title="ISO 10303-22">-22</a></li> <li><a href="/wiki/ISO_10303-28" title="ISO 10303-28">-28</a></li> <li><a href="/wiki/STEP-NC" title="STEP-NC">-238</a></li></ul></li> <li><a href="/wiki/Market_Identifier_Code" title="Market Identifier Code">10383</a></li> <li><a href="/wiki/ArmSCII" title="ArmSCII">10585</a></li> <li><a href="/wiki/IS-IS" title="IS-IS">10589</a></li> <li><a href="/wiki/ISO_10628" title="ISO 10628">10628</a></li> <li><a href="/wiki/Universal_Coded_Character_Set" title="Universal Coded Character Set">10646</a></li> <li><a href="/wiki/Torx" title="Torx">10664</a></li> <li><a href="/wiki/RM-ODP" title="RM-ODP">10746</a></li> <li><a href="/wiki/Multibus" title="Multibus">10861</a></li> <li><a href="/wiki/International_Standard_Music_Number" title="International Standard Music Number">10957</a></li> <li><a href="/wiki/ISO_10962" title="ISO 10962">10962</a></li> <li><a href="/wiki/ISO/IEC_10967" title="ISO/IEC 10967">10967</a></li> <li><a href="/wiki/ISO/IEEE_11073" title="ISO/IEEE 11073">11073</a></li> <li><a href="/wiki/ISO_11170" title="ISO 11170">11170</a></li> <li><a href="/wiki/MPEG-1" title="MPEG-1">11172</a></li> <li><a href="/wiki/ISO/IEC_11179" title="ISO/IEC 11179">11179</a></li> <li><a href="/wiki/ISO/IEC_11404" title="ISO/IEC 11404">11404</a></li> <li><a href="/wiki/JBIG" title="JBIG">11544</a></li> <li><a href="/wiki/ISO_11783" title="ISO 11783">11783</a></li> <li><a href="/wiki/ISO_11784_and_ISO_11785" title="ISO 11784 and ISO 11785">11784</a></li> <li><a href="/wiki/ISO_11784_and_ISO_11785" title="ISO 11784 and ISO 11785">11785</a></li> <li><a href="/wiki/ISO/IEC_11801" title="ISO/IEC 11801">11801</a></li> <li><a href="/wiki/Trusted_Platform_Module" title="Trusted Platform Module">11889</a></li> <li><a href="/wiki/CAN_bus#CAN_lower-layer_standards" title="CAN bus">11898</a></li> <li><a href="/wiki/ISO_11940" title="ISO 11940">11940</a> (<a href="/wiki/ISO_11940-2" title="ISO 11940-2">-2</a>)</li> <li><a href="/wiki/ISO/TR_11941" title="ISO/TR 11941">11941</a></li> <li><a href="/wiki/ISO/TR_11941" title="ISO/TR 11941">11941 (TR)</a></li> <li><a href="/wiki/ISO_11992" title="ISO 11992">11992</a></li> <li><a href="/wiki/ISO_12006" title="ISO 12006">12006</a></li> <li><a href="/wiki/DICOM" title="DICOM">12052</a></li> <li><a href="/wiki/ISO/IEC_TR_12182" title="ISO/IEC TR 12182">12182</a></li> <li><a href="/wiki/ISO/IEC_12207" title="ISO/IEC 12207">12207</a></li> <li><a href="/wiki/TIFF/EP" title="TIFF/EP">12234-2</a></li> <li><a href="/wiki/Linguistic_categories#ISO_12620_(ISO_TC37_Data_Category_Registry,_ISOcat)" title="Linguistic categories">12620</a></li> <li><a href="/wiki/Prolog" title="Prolog">13211</a> <ul><li><a href="/wiki/Prolog" title="Prolog">-1</a></li> <li><a href="/wiki/Prolog" title="Prolog">-2</a></li></ul></li> <li><a href="/wiki/Isofix" title="Isofix">13216</a></li> <li><a href="/wiki/Topic_map" title="Topic map">13250</a></li> <li><a href="/wiki/ISO_13399" title="ISO 13399">13399</a></li> <li><a href="/wiki/ISO_13406-2" title="ISO 13406-2">13406-2</a></li> <li><a href="/wiki/110_film" title="110 film">13450</a></li> <li><a href="/wiki/ISO_13485" title="ISO 13485">13485</a></li> <li><a href="/wiki/ISO_13490" title="ISO 13490">13490</a></li> <li><a href="/wiki/ISO_13567" title="ISO 13567">13567</a></li> <li><a href="/wiki/Z_notation" title="Z notation">13568</a></li> <li><a href="/wiki/ISO_13584" title="ISO 13584">13584</a></li> <li><a href="/wiki/International_Bank_Account_Number" title="International Bank Account Number">13616</a></li> <li><a href="/wiki/ISLISP" title="ISLISP">13816</a></li> <li><a href="/wiki/MPEG-2" title="MPEG-2">13818</a></li> <li><a href="/wiki/ISO_14000_family" title="ISO 14000 family">14000</a></li> <li><a href="/wiki/ISO_14031" title="ISO 14031">14031</a></li> <li><a href="/wiki/ISO_14224" title="ISO 14224">14224</a></li> <li><a href="/wiki/PDF/UA" title="PDF/UA">14289</a></li> <li><a href="/wiki/Horsepower" title="Horsepower">14396</a></li> <li><a href="/wiki/ISO/IEC_14443" title="ISO/IEC 14443">14443</a></li> <li><a href="/wiki/MPEG-4" title="MPEG-4">14496</a> <ul><li><a href="/wiki/MPEG-4_Part_2" title="MPEG-4 Part 2">-2</a></li> <li><a href="/wiki/MPEG-4_Part_3" title="MPEG-4 Part 3">-3</a></li> <li><a href="/wiki/Delivery_Multimedia_Integration_Framework" title="Delivery Multimedia Integration Framework">-6</a></li> <li><a href="/wiki/Advanced_Video_Coding" title="Advanced Video Coding">-10</a></li> <li><a href="/wiki/MPEG-4_Part_11" title="MPEG-4 Part 11">-11</a></li> <li><a href="/wiki/ISO_base_media_file_format" title="ISO base media file format">-12</a></li> <li><a href="/wiki/MP4_file_format" title="MP4 file format">-14</a></li> <li><a href="/wiki/MP4_file_format" title="MP4 file format">-17</a></li> <li><a href="/wiki/MP4_file_format" title="MP4 file format">-20</a></li></ul></li> <li><a href="/wiki/ISO_14617" title="ISO 14617">14617</a></li> <li><a href="/wiki/ISO_14644" title="ISO 14644">14644</a></li> <li><a href="/wiki/STEP-NC" title="STEP-NC">14649</a></li> <li><a href="/wiki/ISO/IEC_14651" title="ISO/IEC 14651">14651</a></li> <li><a href="/wiki/ISO_14698" title="ISO 14698">14698</a></li> <li><a href="/wiki/Software_maintenance" title="Software maintenance">14764</a></li> <li><a href="/wiki/C%2B%2B" title="C++">14882</a></li> <li><a href="/wiki/ISO_14971" title="ISO 14971">14971</a></li> <li><a href="/wiki/ISO_15022" title="ISO 15022">15022</a></li> <li><a href="/wiki/ISO_15189" title="ISO 15189">15189</a></li> <li><a href="/wiki/ISO/IEC_15288" title="ISO/IEC 15288">15288</a></li> <li><a href="/wiki/Ada_Semantic_Interface_Specification" title="Ada Semantic Interface Specification">15291</a></li> <li><a href="/wiki/ISO_15398" title="ISO 15398">15398</a></li> <li><a href="/wiki/Common_Criteria" title="Common Criteria">15408</a></li> <li><a href="/wiki/JPEG_2000" title="JPEG 2000">15444</a> <ul><li><a href="/wiki/Motion_JPEG_2000" title="Motion JPEG 2000">-3</a></li> <li><a href="/wiki/JPIP" title="JPIP">-9</a></li></ul></li> <li><a href="/wiki/HTML" title="HTML">15445</a></li> <li><a href="/wiki/PDF417" title="PDF417">15438</a></li> <li><a href="/wiki/ISO/IEC_15504" title="ISO/IEC 15504">15504</a></li> <li><a href="/wiki/International_Standard_Identifier_for_Libraries_and_Related_Organizations" title="International Standard Identifier for Libraries and Related Organizations">15511</a></li> <li><a href="/wiki/ISO_15686" title="ISO 15686">15686</a></li> <li><a href="/wiki/ISO/IEC_15693" title="ISO/IEC 15693">15693</a></li> <li><a href="/wiki/International_Standard_Audiovisual_Number" title="International Standard Audiovisual Number">15706</a> <ul><li><a href="/wiki/International_Standard_Audiovisual_Number" title="International Standard Audiovisual Number">-2</a></li></ul></li> <li><a href="/wiki/International_Standard_Musical_Work_Code" title="International Standard Musical Work Code">15707</a></li> <li><a href="/wiki/ISO/IEC_15897" title="ISO/IEC 15897">15897</a></li> <li><a href="/wiki/ISO_15919" title="ISO 15919">15919</a></li> <li><a href="/wiki/ISO_15924" title="ISO 15924">15924</a></li> <li><a href="/wiki/ISO_15926" title="ISO 15926">15926</a></li> <li><a href="/wiki/ISO_15926_WIP" title="ISO 15926 WIP">15926 WIP</a></li> <li><a href="/wiki/PDF/X" title="PDF/X">15930</a></li> <li><a href="/wiki/MPEG-7" title="MPEG-7">15938</a></li> <li><a href="/wiki/MaxiCode" title="MaxiCode">16023</a></li> <li><a href="/wiki/ECMAScript" title="ECMAScript">16262</a></li> <li><a href="/wiki/Quality_function_deployment" title="Quality function deployment">16355-1</a></li> <li><a href="/wiki/Mixed_raster_content" title="Mixed raster content">16485</a></li> <li><a href="/wiki/PDF/VT" title="PDF/VT">16612-2</a></li> <li><a href="/wiki/ISO_16750" title="ISO 16750">16750</a></li> <li><a href="/wiki/IATF_16949" title="IATF 16949">16949 (TS)</a></li> <li><a href="/wiki/ISO/IEC_17024" title="ISO/IEC 17024">17024</a></li> <li><a href="/wiki/ISO/IEC_17025" title="ISO/IEC 17025">17025</a></li> <li><a href="/wiki/ISO_17100" title="ISO 17100">17100</a></li> <li><a href="/wiki/Open_Virtualization_Format" title="Open Virtualization Format">17203</a></li> <li><a href="/wiki/SDMX" title="SDMX">17369</a></li> <li><a href="/wiki/Legal_Entity_Identifier" title="Legal Entity Identifier">17442</a></li> <li><a href="/wiki/COLLADA" title="COLLADA">17506</a></li> <li><a href="/wiki/ISO/IEC_27002" title="ISO/IEC 27002">17799</a></li> <li><a href="/wiki/QR_code" title="QR code">18004</a></li> <li><a href="/wiki/ISO/IEC_18014" title="ISO/IEC 18014">18014</a></li> <li><a href="/wiki/JPEG_XL" title="JPEG XL">18181</a></li> <li><a href="/wiki/ISO_18245" title="ISO 18245">18245</a></li> <li><a href="/wiki/Process_Specification_Language" title="Process Specification Language">18629</a></li> <li><a href="/wiki/Photographic_Activity_Test" title="Photographic Activity Test">18916</a></li> <li><a href="/wiki/PDF/A" title="PDF/A">19005</a></li> <li><a href="/wiki/ISO_19011" title="ISO 19011">19011</a></li> <li><a href="/wiki/ISO_19092" title="ISO 19092">19092</a> <ul><li><a href="/wiki/ISO_19092-1" class="mw-redirect" title="ISO 19092-1">-1</a></li> <li><a href="/wiki/ISO_19092-2" class="mw-redirect" title="ISO 19092-2">-2</a></li></ul></li> <li><a href="/wiki/ISO_19114" title="ISO 19114">19114</a></li> <li><a href="/wiki/Geospatial_metadata#ISO_19115:_Geographic_information_–_Metadata" title="Geospatial metadata">19115</a></li> <li><a href="/wiki/Simple_Features" title="Simple Features">19125</a></li> <li><a href="/wiki/Geography_Markup_Language#ISO_19136" title="Geography Markup Language">19136</a></li> <li><a href="/wiki/Shoe_size" title="Shoe size">19407</a></li> <li><a href="/wiki/ISO_19439" title="ISO 19439">19439</a></li> <li><a href="/wiki/Common_Object_Request_Broker_Architecture" title="Common Object Request Broker Architecture">19500</a></li> <li><a href="/wiki/Unified_Modeling_Language" title="Unified Modeling Language">19501</a></li> <li><a href="/wiki/Meta-Object_Facility" title="Meta-Object Facility">19502</a></li> <li><a href="/wiki/XML_Metadata_Interchange" title="XML Metadata Interchange">19503</a></li> <li><a href="/wiki/Unified_Modeling_Language" title="Unified Modeling Language">19505</a></li> <li><a href="/wiki/Knowledge_Discovery_Metamodel" title="Knowledge Discovery Metamodel">19506</a></li> <li><a href="/wiki/Object_Constraint_Language" title="Object Constraint Language">19507</a></li> <li><a href="/wiki/Meta-Object_Facility" title="Meta-Object Facility">19508</a></li> <li><a href="/wiki/XML_Metadata_Interchange" title="XML Metadata Interchange">19509</a></li> <li><a href="/wiki/Business_Process_Model_and_Notation" title="Business Process Model and Notation">19510</a></li> <li><a href="/wiki/ISO_19600" title="ISO 19600">19600</a></li> <li><a href="/wiki/ISO/IEC_19752" title="ISO/IEC 19752">19752</a></li> <li><a href="/wiki/RELAX_NG" title="RELAX NG">19757</a></li> <li><a href="/wiki/ISO/IEC_19770" title="ISO/IEC 19770">19770</a></li> <li><a href="/wiki/X3D" title="X3D">19775-1</a></li> <li><a href="/wiki/ISO/IEC_19794-5" title="ISO/IEC 19794-5">19794-5</a></li> <li><a href="/wiki/Cloud_Infrastructure_Management_Interface" title="Cloud Infrastructure Management Interface">19831</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">20000–29999</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/ISO/IEC_20000" title="ISO/IEC 20000">20000</a></li> <li><a href="/wiki/ISO_20022" title="ISO 20022">20022</a></li> <li><a href="/wiki/ISO_20121" title="ISO 20121">20121</a></li> <li><a href="/wiki/ISO_20400" title="ISO 20400">20400</a></li> <li><a href="/wiki/Open_Data_Protocol" title="Open Data Protocol">20802</a></li> <li><a href="/wiki/Han_Xin_code" title="Han Xin code">20830</a></li> <li><a href="/wiki/MPEG-21" title="MPEG-21">21000</a></li> <li><a href="/wiki/ISO_21001" title="ISO 21001">21001</a></li> <li><a href="/wiki/International_Standard_Text_Code" title="International Standard Text Code">21047</a></li> <li><a href="/wiki/JPEG_XS" title="JPEG XS">21122</a></li> <li><a href="/wiki/ISO_21500" title="ISO 21500">21500</a></li> <li><a href="/wiki/ISO/IEC_21827" title="ISO/IEC 21827">21827</a></li> <li><a href="/wiki/ISO_22000" title="ISO 22000">22000</a></li> <li><a href="/wiki/ECMAScript" title="ECMAScript">22275</a></li> <li><a href="/wiki/ISO_22300" title="ISO 22300">22300</a></li> <li><a href="/wiki/ISO_22301" title="ISO 22301">22301</a></li> <li><a href="/wiki/ISO_22395" title="ISO 22395">22395</a></li> <li><a href="/wiki/ECMAScript_for_XML" title="ECMAScript for XML">22537</a></li> <li><a href="/wiki/MPEG-A" title="MPEG-A">23000</a></li> <li><a href="/wiki/MPEG-D" title="MPEG-D">23003</a></li> <li><a href="/wiki/MPEG-H" title="MPEG-H">23008</a></li> <li><a href="/wiki/Dynamic_Adaptive_Streaming_over_HTTP" title="Dynamic Adaptive Streaming over HTTP">23009</a></li> <li><a href="/wiki/Versatile_Video_Coding" title="Versatile Video Coding">23090-3</a></li> <li><a href="/wiki/MPEG-G" title="MPEG-G">23092</a></li> <li><a href="/wiki/Essential_Video_Coding" title="Essential Video Coding">23094-1</a></li> <li><a href="/wiki/LCEVC" title="LCEVC">23094-2</a></li> <li><a href="/wiki/C_Sharp_(programming_language)" title="C Sharp (programming language)">23270</a></li> <li><a href="/wiki/Common_Language_Infrastructure" title="Common Language Infrastructure">23271</a></li> <li><a href="/wiki/Linux_Standard_Base" title="Linux Standard Base">23360</a></li> <li><a href="/wiki/Rectangular_Micro_QR_Code" title="Rectangular Micro QR Code">23941</a></li> <li><a href="/wiki/PDF/E" title="PDF/E">24517</a></li> <li><a href="/wiki/Lexical_Markup_Framework" title="Lexical Markup Framework">24613</a></li> <li><a href="/wiki/ISO-TimeML" title="ISO-TimeML">24617</a></li> <li><a href="/wiki/Common_Logic" title="Common Logic">24707</a></li> <li><a href="/wiki/MicroPDF417" title="MicroPDF417">24728</a></li> <li><a href="/wiki/ISO_25178" title="ISO 25178">25178</a></li> <li><a href="/wiki/ISO_25964" title="ISO 25964">25964</a></li> <li><a href="/wiki/ISO_26000" title="ISO 26000">26000</a></li> <li><a href="/wiki/ISO_26262" title="ISO 26262">26262</a></li> <li><a href="/wiki/OpenDocument" title="OpenDocument">26300</a></li> <li><a href="/wiki/Digital_object_identifier" title="Digital object identifier">26324</a></li> <li><a href="/wiki/ISO/IEC_27000_family" title="ISO/IEC 27000 family">27000 series</a></li> <li><a href="/wiki/ISO/IEC_27000" title="ISO/IEC 27000">27000</a></li> <li><a href="/wiki/ISO/IEC_27001" title="ISO/IEC 27001">27001</a></li> <li><a href="/wiki/ISO/IEC_27002" title="ISO/IEC 27002">27002</a></li> <li><a href="/wiki/ISO/IEC_27005" title="ISO/IEC 27005">27005</a></li> <li><a href="/wiki/ISO/IEC_27006" title="ISO/IEC 27006">27006</a></li> <li><a href="/wiki/International_Standard_Name_Identifier" title="International Standard Name Identifier">27729</a></li> <li><a href="/wiki/ISO_28000" title="ISO 28000">28000</a></li> <li>29110</li> <li><a href="/wiki/Requirements_engineering" title="Requirements engineering">29148</a></li> <li><a href="/wiki/JPEG_XR" title="JPEG XR">29199-2</a></li> <li><a href="/wiki/Office_Open_XML" title="Office Open XML">29500</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">30000+</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Ruby_(programming_language)" title="Ruby (programming language)">30170</a></li> <li><a href="/wiki/ISO_31000" title="ISO 31000">31000</a></li> <li><a href="/wiki/PDF" title="PDF">32000</a></li> <li><a href="/wiki/ISO_37001" title="ISO 37001">37001</a></li> <li><a href="/wiki/ISO/IEC_38500" title="ISO/IEC 38500">38500</a></li> <li><a href="/wiki/Graph_Query_Language" title="Graph Query Language">39075</a></li> <li><a href="/wiki/Web_Content_Accessibility_Guidelines" title="Web Content Accessibility Guidelines">40500</a></li> <li><a href="/wiki/ISO/IEC_42010" title="ISO/IEC 42010">42010</a></li> <li><a href="/wiki/ISO_45001" title="ISO 45001">45001</a></li> <li><a href="/wiki/ISO_50001" title="ISO 50001">50001</a></li> <li><a href="/wiki/ISO_55000" title="ISO 55000">55000</a></li> <li><a href="/wiki/ISO_56000" title="ISO 56000">56000</a></li> <li><a href="/wiki/ISO/IEC_80000" title="ISO/IEC 80000">80000</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" 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