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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>atexit</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-utility.html">utility</a>&lrm; | <a href="cpp-utility-program.html">program</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-cstdlib.html">&lt;cstdlib&gt;</a></code></div>
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<td rowspan="142">(1)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> atexit<span class="br0">(</span> <span class="coMULTI">/*c-atexit-handler*/</span><span class="sy2">*</span> func <span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw4">int</span> atexit<span class="br0">(</span> <span class="coMULTI">/*atexit-handler*/</span><span class="sy2">*</span> func <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> atexit<span class="br0">(</span> <span class="coMULTI">/*c-atexit-handler*/</span><span class="sy2">*</span> func <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span><br />
<span class="kw4">int</span> atexit<span class="br0">(</span> <span class="coMULTI">/*atexit-handler*/</span><span class="sy2">*</span> func <span class="br0">)</span> <span class="kw1">noexcept</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">extern</span> <span class="st0">&quot;C++&quot;</span> <span class="kw1">using</span> <span class="coMULTI">/*atexit-handler*/</span> <span class="sy1">=</span> <span class="kw4">void</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#20026;&#35828;&#26126;</span><br />
<span class="kw4">extern</span> <span class="st0">&quot;C&quot;</span> <span class="kw1">using</span> <span class="coMULTI">/*c-atexit-handler*/</span> <span class="sy1">=</span> <span class="kw4">void</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#20165;&#20026;&#35828;&#26126;</span></span></div>
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<p>&#27880;&#20876; <code>func</code> &#25152;&#25351;&#21521;&#30340;&#20989;&#25968;&#65292;&#20351;&#24471;&#22312;&#27491;&#24120;&#31243;&#24207;&#20013;&#27490;&#65288;&#36890;&#36807; <span class="t-lc"><a href="cpp-utility-program-exit.html">std::exit()</a></span> &#25110;&#20174; <a href="cpp-language-main_function.html">main &#20989;&#25968;</a>&#36820;&#22238;&#65289;&#26102;&#35843;&#29992;&#23427;&#12290;</p>
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<p>&#21487;&#33021;&#22312;&#38745;&#24577;&#23545;&#35937;&#26512;&#26500;&#26399;&#38388;&#20197;&#36870;&#24207;&#35843;&#29992;&#20989;&#25968;&#65306;&#33509; A &#20808;&#20110; B &#34987;&#27880;&#20876;&#65292;&#21017;&#23545; B &#30340;&#35843;&#29992;&#20808;&#36827;&#34892;&#20110;&#23545; A &#30340;&#35843;&#29992;&#12290;&#21516;&#26679;&#30340;&#35268;&#21017;&#24212;&#29992;&#20110;&#38745;&#24577;&#23545;&#35937;&#26500;&#36896;&#20989;&#25968;&#21644;&#21040; <code>atexit</code> &#30340;&#35843;&#29992;&#65306;&#35265; <span class="t-lc"><a href="cpp-utility-program-exit.html">std::exit</a></span> &#12290;</p>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<p>&#20989;&#25968;&#21487;&#33021;&#19982;&#25317;&#26377;&#38745;&#24577;&#23384;&#20648;&#26399;&#30340;&#23545;&#35937;&#30340;&#26512;&#26500;&#20989;&#25968;&#65292;&#25110;&#24444;&#27492;&#38388;&#24182;&#21457;&#35843;&#29992;&#65292;&#36825;&#20445;&#25345;&#20445;&#35777;&#33509; A &#30340;&#27880;&#20876;&#20808;&#24207;&#20110; B &#30340;&#27880;&#20876;&#65292;&#21017;&#23545; B &#30340;&#35843;&#29992;&#20808;&#24207;&#20110;&#23545; A &#30340;&#35843;&#29992;&#65292;&#21516;&#26679;&#30340;&#35268;&#21017;&#24212;&#29992;&#20110;&#38745;&#24577;&#23545;&#35937;&#26500;&#36896;&#20989;&#25968;&#21644;&#21040; <code>atexit</code> &#30340;&#35843;&#29992;&#65306;&#35265; <span class="t-lc"><a href="cpp-utility-program-exit.html">std::exit</a></span> &#12290;</p>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#21487;&#20197;&#27880;&#20876;&#21516;&#19968;&#20989;&#25968;&#22810;&#20110;&#19968;&#27425;&#12290;</p>
<p>&#33509;&#20989;&#25968;&#36890;&#36807;&#24322;&#24120;&#36864;&#20986;&#65292;&#21017;&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-error-terminate.html"><span class="kw783">std::<span class="me2">terminate</span></span></a></span></span> &#12290;</p>
<p><code>atexit</code> &#26159;&#32447;&#31243;&#23433;&#20840;&#30340;&#65306;&#20174;&#25968;&#20010;&#32447;&#31243;&#35843;&#29992;&#20989;&#25968;&#19981;&#24341;&#20837;&#25968;&#25454;&#31454;&#20105;&#12290;</p>
<p>&#20445;&#35777;&#23454;&#29616;&#25903;&#25345;&#27880;&#20876;&#33267;&#23569; <code>32</code> &#20010;&#20989;&#25968;&#12290;&#20934;&#30830;&#38480;&#21046;&#26159;&#23454;&#29616;&#23450;&#20041;&#30340;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>func</td>
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<td>&#25351;&#21521;&#27491;&#24120;&#31243;&#24207;&#32456;&#27490;&#26102;&#35201;&#35843;&#29992;&#30340;&#20989;&#25968;&#30340;&#25351;&#38024;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#33509;&#27880;&#20876;&#25104;&#21151;&#21017;&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp">&#8203;<span class="nu0">0</span>&#8203;</span></span> &#65292;&#21542;&#21017;&#20026;&#38750;&#38646;&#20540;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E8.A7.A3">&#27880;&#35299;</span></h3>
<p>&#20108;&#20010;&#37325;&#36733;&#26377;&#21035;&#65292;&#22240;&#20026;&#21442;&#25968; <code>func</code> &#31867;&#22411;&#26377;&#21035;&#65288;<a href="cpp-language-language_linkage.html">&#35821;&#35328;&#38142;&#25509;</a>&#26159;&#20854;&#31867;&#22411;&#30340;&#19968;&#37096;&#20998;&#65289;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;cstdlib&gt;</span>
<span class="kw4">void</span> atexit_handler_1<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;at exit #1<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">void</span> atexit_handler_2<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;at exit #2<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">const</span> <span class="kw4">int</span> result_1 <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">atexit</span><span class="br0">(</span>atexit_handler_1<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">const</span> <span class="kw4">int</span> result_2 <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">atexit</span><span class="br0">(</span>atexit_handler_2<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span><span class="br0">(</span>result_1 <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span> <span class="sy3">||</span> <span class="br0">(</span>result_2 <span class="sy3">!</span><span class="sy1">=</span> <span class="nu0">0</span><span class="br0">)</span><span class="br0">)</span> <span class="br0">{</span>
<a href="cpp-io-cerr.html"><span class="kw1759">std::<span class="me2">cerr</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Registration failed<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="kw1">return</span> <a href="cpp-utility-program-EXIT_status.html"><span class="kw972">EXIT_FAILURE</span></a><span class="sy4">;</span>
<span class="br0">}</span>
<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;returning from main<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="kw1">return</span> <a href="cpp-utility-program-EXIT_status.html"><span class="kw971">EXIT_SUCCESS</span></a><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<div class="text source-text">
<pre class="de1">returning from main
at exit #2
at exit #1</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
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<div class="t-dsc-member-div">
<div><a href="cpp-utility-program-abort.html"><span class="t-lines"><span>abort</span></span></a></div>
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<td>&#23548;&#33268;&#38750;&#27491;&#24120;&#30340;&#31243;&#24207;&#32456;&#27490;&#65288;&#19981;&#36827;&#34892;&#28165;&#29702;&#65289;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-utility-program-exit.html"><span class="t-lines"><span>exit</span></span></a></div>
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<td>&#23548;&#33268;&#27491;&#24120;&#30340;&#31243;&#24207;&#32456;&#27490;&#24182;&#36827;&#34892;&#28165;&#29702;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-utility-program-quick_exit.html"><span class="t-lines"><span>quick_exit</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>&#23548;&#33268;&#24555;&#36895;&#31243;&#24207;&#32456;&#27490;&#65292;&#19981;&#36827;&#34892;&#23436;&#20840;&#30340;&#28165;&#29702;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<td>
<div class="t-dsc-member-div">
<div><a href="cpp-utility-program-at_quick_exit.html"><span class="t-lines"><span>at_quick_exit</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>&#27880;&#20876;&#23558;&#20110;&#35843;&#29992; <a href="cpp-utility-program-quick_exit.html"><tt>quick_exit</tt></a> &#26102;&#34987;&#35843;&#29992;&#30340;&#20989;&#25968;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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