44 lines
2.8 KiB
HTML
44 lines
2.8 KiB
HTML
<!DOCTYPE html>
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>标准库头文件 <cstdbool></title>
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<link rel="stylesheet" href="ext.css" />
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<link rel="stylesheet" href="site_modules.css" />
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</head>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_header_cstdbool skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<div id="content"><a id="top"></a>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">标准库头文件</span> <cstdbool></h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-header.html">header</a></span></div>
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<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
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<p>此头文件原作为 <code><b><stdbool.h></b></code> 存在于 C 标准库。</p>
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<p>兼容性头文件，在 C 中定义 <a href="cpp-keyword-true.html"><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span></a>、<a href="cpp-keyword-false.html"><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span></a> 及 <a href="cpp-keyword-bool.html"><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span></a>，它们在 C++ 中是关键词。</p>
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<table class="t-dsc-begin">
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<tr>
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<td colspan="2">
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<h3><span class="mw-headline" id=".E5.AE.8F">宏</span></h3>
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</td>
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</tr>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><span class="t-lines"><span>__bool_true_false_are_defined</span></span></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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</div>
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</td>
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<td>C 兼容宏常量，展开成整数字面量 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">1</span></span></span><br />
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<span class="t-mark">(宏常量)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">注解</span></h3>
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<p>此头文件于 C++17 中弃用并于 C++20 中移除。对应的 <code><stdbool.h></code> 在 C++20 中仍可用。</p>
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</div>
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<div class="visualClear"></div>
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</div>
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</div>
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</div>
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</body>
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</html>
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