139 lines
6.0 KiB
HTML
139 lines
6.0 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>EXIT_SUCCESS, EXIT_FAILURE</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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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-c_program_EXIT_status 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">EXIT_SUCCESS, EXIT_FAILURE</h1>
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<div id="bodyContent">
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<div id="contentSub"><span class="subpages">< <a href="c.html">c</a>‎ | <a href="c-program.html">program</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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<table class="t-dcl-begin">
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<tbody>
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<td>
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<div>定义于头文件 <code><stdlib.h></code></div>
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</td>
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<td></td>
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<td></td>
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<div><span class="mw-geshi c source-c"><span class="co2">#define EXIT_SUCCESS /*implementation defined*/</span></span></div>
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<td class="t-dcl-nopad"></td>
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<div><span class="mw-geshi c source-c"><span class="co2">#define EXIT_FAILURE /*implementation defined*/</span></span></div>
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<p><code>EXIT_SUCCESS</code> 和 <code>EXIT_FAILURE</code> 宏展开成能用作 <span class="t-lc"><a href="c-program-exit.html">exit</a></span> 参数的整数表达式（从而作为从 <a href="c-language-main_function.html"><code>main</code> 函数</a>返回的值），并指示程序执行状态。</p>
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<table class="t-dsc-begin">
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<tr class="t-dsc-hitem">
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<td>常量</td>
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<td>解释</td>
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</tr>
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<tr class="t-dsc">
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<td><code>EXIT_SUCCESS</code></td>
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<td>程序执行成功</td>
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</tr>
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<tr class="t-dsc">
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<td><code>EXIT_FAILURE</code></td>
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<td>程序执行不成功</td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p><code>EXIT_SUCCESS</code> 和值零都能指示程序执行成功的状态，尽管并不要求 <code>EXIT_SUCCESS</code> 等于零。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div class="t-example">
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<div class="t-example-live-link"></div>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="c source-c">
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<pre class="de1"><span class="co2">#include <stdio.h></span>
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<span class="co2">#include <stdlib.h></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
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<span class="br0">{</span>
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<a href="c-io.html"><span class="kw882">FILE</span></a> <span class="sy2">*</span>fp <span class="sy1">=</span> <a href="c-io-fopen.html"><span class="kw817">fopen</span></a><span class="br0">(</span><span class="st0">"data.txt"</span>,<span class="st0">"r"</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">if</span> <span class="br0">(</span>fp <span class="sy1">==</span> <a href="c-types-NULL.html"><span class="kw103">NULL</span></a><span class="br0">)</span>
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<span class="br0">{</span>
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<a href="c-io-fprintf.html"><span class="kw850">fprintf</span></a><span class="br0">(</span><a href="c-io.html"><span class="kw886">stderr</span></a>,<span class="st0">"fopen() failed in file %s at line # %d"</span>, __FILE__,__LINE__<span class="br0">)</span><span class="sy4">;</span>
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<a href="c-program-exit.html"><span class="kw488">exit</span></a><span class="br0">(</span>EXIT_FAILURE<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<span class="coMULTI">/* 正常进程持续至此。 */</span>
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<a href="c-io-fclose.html"><span class="kw820">fclose</span></a><span class="br0">(</span>fp<span class="br0">)</span><span class="sy4">;</span>
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<a href="c-io-fprintf.html"><span class="kw849">printf</span></a><span class="br0">(</span><span class="st0">"Normal Return<span class="es1">\n</span>"</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">return</span> EXIT_SUCCESS<span class="sy4">;</span>
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<span class="br0">}</span></pre></div>
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</div>
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<p>输出：</p>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="text source-text">
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<pre class="de1">fopen() failed in file main.cpp at line # 9</pre></div>
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</div>
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</div>
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<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">引用</span></h3>
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<div class="t-ref-std-11">
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<ul>
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<li>C11 标准（ISO/IEC 9899:2011）：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li>7.22/3 General utilities <stdlib.h> (p: 340)</li>
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</ul>
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</dd>
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</dl>
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<div class="t-ref-std-c99">
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<ul>
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<li>C99 标准（ISO/IEC 9899:1999）：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li>7.20/3 General utilities <stdlib.h> (p: 306)</li>
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</ul>
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</dd>
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</dl>
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<div class="t-ref-std-c89">
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<ul>
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<li>C89/C90 标准（ISO/IEC 9899:1990）：</li>
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</ul>
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<dl>
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<dd>
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<ul>
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<li>4.10 General utilities <stdlib.h></li>
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</ul>
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</dd>
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</dl>
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</div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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