125 lines
6.5 KiB
HTML
125 lines
6.5 KiB
HTML
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<title>std::bitset<N>::set</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_utility_bitset_set skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::bitset<N>::</span>set</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-utility.html">utility</a>‎ | <a href="cpp-utility-bitset.html">bitset</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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<td></td>
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<td rowspan="142">(1)</td>
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<td></td>
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<tr class="t-dcl t-until-cxx11">
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<div><span class="mw-geshi cpp source-cpp">bitset<span class="sy3">&</span> set<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td class="t-dcl-nopad"></td>
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<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
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<div><span class="mw-geshi cpp source-cpp">bitset<span class="sy3">&</span> set<span class="br0">(</span><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 起)</span></td>
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<div><span class="mw-geshi cpp source-cpp">bitset<span class="sy3">&</span> set<span class="br0">(</span> <a href="cpp-types-size_t.html"><span class="kw100">std::<span class="me2">size_t</span></span></a> pos, <span class="kw4">bool</span> value <span class="sy1">=</span> <span class="kw2">true</span> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
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<p>设置所有位为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 或到指定值。</p>
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<div class="t-li1"><span class="t-li">1)</span> 设置所有位为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> 。</div>
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<div class="t-li1"><span class="t-li">2)</span> 设置在 <code>pos</code> 的位为值 <code>value</code> 。</div>
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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>pos</td>
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<td>-</td>
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<td>要设置的位的位置（从最低到最高）</td>
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</tr>
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<tr class="t-par">
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<td>value</td>
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<td>-</td>
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<td>对位设置的值</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><span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="sy2">*</span>this</span></span></p>
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<h3><span class="mw-headline" id=".E5.BC.82.E5.B8.B8">异常</span></h3>
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<div class="t-li1"><span class="t-li">2)</span> 若 <code>pos</code> 不对应 bitset 内的合法位置则抛出 <span class="t-lc"><a href="cpp-error-out_of_range.html">std::out_of_range</a></span> 。</div>
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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="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <iostream></span>
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<span class="co2">#include <bitset></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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<a href="cpp-utility-bitset.html"><span class="kw1027">std::<span class="me2">bitset</span></span></a><span class="sy1"><</span><span class="nu0">8</span><span class="sy1">></span> b<span class="sy4">;</span>
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<span class="kw1">for</span> <span class="br0">(</span>size_t i <span class="sy1">=</span> <span class="nu0">1</span><span class="sy4">;</span> i <span class="sy1"><</span> b.<span class="me1">size</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span> i <span class="sy2">+</span><span class="sy1">=</span> <span class="nu0">2</span><span class="br0">)</span> <span class="br0">{</span>
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b.<span class="me1">set</span><span class="br0">(</span>i<span class="br0">)</span><span class="sy4">;</span>
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<span class="br0">}</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> b <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">10101010</pre></div>
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</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-utility-bitset-reset.html"><span class="t-lines"><span>reset</span></span></a></div>
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</div>
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</td>
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<td>将位置为 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span><br />
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<span class="t-mark">(公开成员函数)</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-bitset-flip.html"><span class="t-lines"><span>flip</span></span></a></div>
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</div>
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</td>
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<td>翻转位的值<br />
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<span class="t-mark">(公开成员函数)</span></td>
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</tr>
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</table>
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</div>
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<div class="visualClear"></div>
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