121 lines
6.4 KiB
HTML
121 lines
6.4 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>std::strrchr</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_string_byte_strrchr skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>strrchr</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-string.html">string</a>‎ | <a href="cpp-string-byte.html">byte</a></span></div>
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<div>定义于头文件 <code><a href="cpp-header-cstring.html"><cstring></a></code></div>
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<td></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> strrchr<span class="br0">(</span> <span class="kw4">const</span> <span class="kw4">char</span><span class="sy2">*</span> str, <span class="kw4">int</span> ch <span class="br0">)</span><span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"> <span class="kw4">char</span><span class="sy2">*</span> strrchr<span class="br0">(</span> <span class="kw4">char</span><span class="sy2">*</span> str, <span class="kw4">int</span> ch <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>寻找 <code>ch</code> （转换到 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span> 后）在 <code>str</code> 所指向的空终止字节串中的最后出现。若搜索 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="st0">'<span class="es5">\0</span>'</span></span></span> ，则认为终止空字符为字符串的一部分，而且能找到。</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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<td>str</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>ch</td>
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<td>-</td>
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<td>要搜索的字符</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>str</code> 中找到的字符的指针，或若找不到这种字符则为空指针。</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="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <iostream></span>
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<span class="co2">#include <cstring></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="kw4">char</span> input<span class="br0">[</span><span class="br0">]</span> <span class="sy1">=</span> <span class="st0">"/home/user/hello.c"</span><span class="sy4">;</span>
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<span class="kw4">char</span><span class="sy2">*</span> output <span class="sy1">=</span> std<span class="sy4">::</span><span class="me2">strrchr</span><span class="br0">(</span>input, <span class="st0">'/'</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw1">if</span><span class="br0">(</span>output<span class="br0">)</span>
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<a href="cpp-io-cout.html"><span class="kw1757">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> output<span class="sy2">+</span><span class="nu0">1</span> <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</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">hello.c</pre></div>
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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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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-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>寻找字符的首次出现<br />
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<span class="t-mark">(函数)</span></td>
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<tr 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-string-wide-wcsrchr.html"><span class="t-lines"><span>wcsrchr</span></span></a></div>
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</div>
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</td>
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<td>在宽字符串中寻找宽字符的最后一次出现<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="cpp-string-basic_string-rfind.html"><span class="t-lines"><span>rfind</span></span></a></div>
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</div>
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</td>
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<td>寻找子串的最后一次出现<br />
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<span class="t-mark">(<code>std::basic_string<CharT,Traits,Allocator></code> 的公开成员函数)</span></td>
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<div class="visualClear"></div>
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