94 lines
4.2 KiB
HTML
94 lines
4.2 KiB
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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<title>标准库头文件 <cstdarg></title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_header_cstdarg skin-cppreference2 action-view cpp-navbar">
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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> <cstdarg></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><stdarg.h></b></code> 存在于 C 标准库。</p>
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<p>此头文件提供对 <a href="cpp-utility-variadic.html">C 风格变参函数</a>的支持。</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=".E7.B1.BB.E5.9E.8B">类型</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><a href="cpp-utility-variadic-va_list.html"><span class="t-lines"><span>va_list</span></span></a></div>
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</div>
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</td>
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<td>保有 va_start、va_arg、va_end 和 va_copy 所需的信息<br />
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<span class="t-mark">(typedef)</span></td>
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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><a href="cpp-utility-variadic-va_start.html"><span class="t-lines"><span>va_start</span></span></a></div>
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</div>
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</td>
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<td>启用对可变函数实参的访问<br />
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<span class="t-mark">(宏函数)</span></td>
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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><a href="cpp-utility-variadic-va_arg.html"><span class="t-lines"><span>va_arg</span></span></a></div>
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</div>
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</td>
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<td>访问下一个可变函数实参<br />
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<span class="t-mark">(宏函数)</span></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><a href="cpp-utility-variadic-va_copy.html"><span class="t-lines"><span>va_copy</span></span></a></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>制造可变函数实参的副本<br />
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<span class="t-mark">(宏函数)</span></td>
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<tr class="t-dsc">
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<div class="t-dsc-member-div">
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<div><a href="cpp-utility-variadic-va_end.html"><span class="t-lines"><span>va_end</span></span></a></div>
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</div>
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</td>
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<td>结束对可变函数实参的遍历<br />
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<span class="t-mark">(宏函数)</span></td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">概要</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
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<span class="kw1">using</span> <span class="kw4">va_list</span> <span class="sy1">=</span> <span class="coMULTI">/* 见描述 */</span> <span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="co2">#define va_arg(V, P) /* 见描述 */</span>
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<span class="co2">#define va_copy(VDST, VSRC) /* 见描述 */</span>
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<span class="co2">#define va_end(V) /* 见描述 */</span>
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<span class="co2">#define va_start(V, P) /* 见描述 */</span></pre></div>
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