162 lines
8.0 KiB
HTML
162 lines
8.0 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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<title>strpbrk</title>
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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_string_byte_strpbrk 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">strpbrk</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-string.html">string</a>‎ | <a href="c-string-byte.html">byte</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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<td>
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<div>定义于头文件 <code><string.h></code></div>
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<td></td>
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<div><span class="mw-geshi c source-c"><span class="kw4">char</span><span class="sy2">*</span> strpbrk<span class="br0">(</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> dest, <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> breakset <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>在 <code>dest</code> 所指向的空终止字节串中，扫描来自 <code>breakset</code> 所指向的空终止字节串的任何字符，并返回指向该字符的指针。</p>
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<p>若 <code>dest</code> 或 <code>breakset</code> 不是指向空终止字节字符串的指针则行为未定义。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<table class="t-par-begin">
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<tr class="t-par">
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<td>dest</td>
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<td>-</td>
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<td>指向要分析的空终止字节字符串的指针</td>
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</tr>
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<tr class="t-par">
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<td>breakset</td>
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<td>-</td>
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<td>指向含要搜索的字符的空终止字节字符串的指针</td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>指向 <code>dest</code> 中首个亦在 <code>breakset</code> 中的字符的指针，或若这种字符不存在则为空指针。</p>
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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>名称代表“字符串指针打断 (string pointer break) ”，因为它返回指向首个分隔符（“打断”）的指针。</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 <string.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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<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> str <span class="sy1">=</span> <span class="st0">"hello world, friend of mine!"</span><span class="sy4">;</span>
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<span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> sep <span class="sy1">=</span> <span class="st0">" ,!"</span><span class="sy4">;</span>
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<span class="kw4">unsigned</span> <span class="kw4">int</span> cnt <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
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<span class="kw1">do</span> <span class="br0">{</span>
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str <span class="sy1">=</span> strpbrk<span class="br0">(</span>str, sep<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 寻找分隔符</span>
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<span class="kw1">if</span><span class="br0">(</span>str<span class="br0">)</span> str <span class="sy2">+</span><span class="sy1">=</span> <a href="c-string-byte-strspn.html"><span class="kw564">strspn</span></a><span class="br0">(</span>str, sep<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// 跳过分隔符</span>
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<span class="sy2">++</span>cnt<span class="sy4">;</span> <span class="co1">// 增加词计数</span>
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<span class="br0">}</span> <span class="kw1">while</span><span class="br0">(</span>str <span class="sy3">&&</span> <span class="sy2">*</span>str<span class="br0">)</span><span class="sy4">;</span>
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<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">"There are %d words<span class="es1">\n</span>"</span>, cnt<span class="br0">)</span><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">There are 5 words</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>7.24.5.4 The strpbrk function (p: 368)</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>7.21.5.4 The strpbrk function (p: 331)</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>4.11.5.4 The strpbrk function</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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<table class="t-dsc-begin">
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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="c-string-byte-strcspn.html"><span class="t-lines"><span>strcspn</span></span></a></div>
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</div>
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</td>
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<td>返回另一个字符串所不具有的字符分割的最大起始段长度<br />
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<span class="t-mark">(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="c-string-byte-strchr.html"><span class="t-lines"><span>strchr</span></span></a></div>
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</div>
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</td>
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<td>查找字符的首次出现<br />
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<span class="t-mark">(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="c-string-byte-strtok.html"><span class="t-lines"><span>strtok</span><span>strtok_s</span></span></a></div>
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<div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div>
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</div>
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</td>
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<td>查找字节字符串中的下一个记号<br />
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<span class="t-mark">(函数)</span></td>
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</tr>
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</table>
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</div>
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</div>
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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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