75 lines
4.0 KiB
HTML
75 lines
4.0 KiB
HTML
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<title>std::subtract_with_carry_engine<UIntType,w,s,r>::discard</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_numeric_random_subtract_with_carry_engine_discard skin-cppreference2 action-view cpp-page-template cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::subtract_with_carry_engine<UIntType,w,s,r>::</span>discard</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-numeric.html">numeric</a>‎ | <a href="cpp-numeric-random.html">random</a>‎ | <a href="cpp-numeric-random-subtract_with_carry_engine.html">subtract with carry engine</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> discard<span class="br0">(</span> <span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span> z <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-since-cxx11">(C++11 起)</span></td>
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<p>令内部状态前进 <code>z</code> 次。等价于调用 <span class="t-lc"><a href="cpp-numeric-random-subtract_with_carry_engine-operator().html">operator()</a></span> <code>z</code> 次并舍弃结果。</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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<td>z</td>
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<td>-</td>
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<td>指定状态前进次数的整数值</td>
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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>（无）</p>
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<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">复杂度</span></h3>
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<td class="mbox-text" style="">本节未完成</td>
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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>对于某些引擎，“快速跳转”算法已知，它们能令状态前进许多步（以百万计）而无需计算中间状态迁移，尽管不需要在常数时间内。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-numeric-random-subtract_with_carry_engine-operator().html"><span class="t-lines"><span>operator()</span></span></a></div>
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<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>推进引擎状态并返回生成的值<br />
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<span class="t-mark">(公开成员函数)</span></td>
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