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<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_numeric skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading">&#25968;&#20540;&#24211;</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<p>C++ &#25968;&#20540;&#24211;&#21253;&#21547;&#24120;&#29992;&#25968;&#23398;&#20989;&#25968;&#21450;&#31867;&#22411;&#65292;&#20197;&#21450;&#20248;&#21270;&#30340;&#25968;&#20540;&#25968;&#32452;&#21450;&#23545;&#38543;&#26426;&#25968;&#29983;&#25104;&#30340;&#25903;&#25345;&#12290;</p>
<h2><span class="mw-headline" id=".E6.95.B0.E5.AD.A6.E5.87.BD.E6.95.B0.E4.B8.8E.E7.B1.BB.E5.9E.8B">&#25968;&#23398;&#20989;&#25968;&#19982;&#31867;&#22411;</span></h2>
<h3><span class="mw-headline" id=".E5.B8.B8.E7.94.A8.E6.95.B0.E5.AD.A6.E5.87.BD.E6.95.B0"><a href="cpp-numeric-math.html">&#24120;&#29992;&#25968;&#23398;&#20989;&#25968;</a></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-cmath.html"><tt>&lt;cmath&gt;</tt></a> &#25552;&#20379;<a href="cpp-numeric-math.html">&#26631;&#20934; C &#24211;&#25968;&#23398;&#20989;&#25968;</a>&#65292;&#20363;&#22914; <span class="t-lc"><a href="cpp-numeric-math-fabs.html">std::fabs</a></span> &#12289; <span class="t-lc"><a href="cpp-numeric-math-sqrt.html">std::sqrt</a></span> &#21450; <span class="t-lc"><a href="cpp-numeric-math-sin.html">std::sin</a></span> &#12290;</p>
<h3><span class="mw-headline" id=".E6.95.B0.E5.AD.A6.E7.89.B9.E6.AE.8A.E5.87.BD.E6.95.B0_.28C.2B.2B17_.E8.B5.B7.29"><a href="cpp-numeric-special_functions.html">&#25968;&#23398;&#29305;&#27530;&#20989;&#25968;</a> <span class="t-mark-rev t-since-cxx17">(C++17 &#36215;)</span></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-cmath.html"><tt>&lt;cmath&gt;</tt></a> &#20134;&#25552;&#20379;&#25968;&#20010;&#29305;&#27530;&#25968;&#23398;&#20989;&#25968;&#65292;&#20363;&#22914; <span class="t-lc"><a href="cpp-numeric-special_math-beta.html" class="mw-redirect">std::beta</a></span> &#12289; <span class="t-lc"><a href="cpp-numeric-special_math-hermite.html" class="mw-redirect">std::hermite</a></span> &#21450; <span class="t-lc"><a href="cpp-numeric-special_math-cyl_bessel_i.html" class="mw-redirect">std::cyl_bessel_i</a></span> &#12290;</p>
<h3><span class="mw-headline" id=".E6.95.B0.E5.AD.A6.E5.B8.B8.E6.95.B0_.28C.2B.2B20_.E8.B5.B7.29"><a href="cpp-numeric-constants.html">&#25968;&#23398;&#24120;&#25968;</a> <span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-numbers.html"><tt>&lt;numbers&gt;</tt></a> &#25552;&#20379;&#25968;&#20010;&#25968;&#23398;&#24120;&#25968;&#65292;&#20363;&#22914; <span class="t-lc">std::numbers::pi</span> &#25110; <span class="t-lc">std::numbers::sqrt2</span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.A4.8D.E6.95.B0.E7.AE.97.E6.9C.AF">&#22797;&#25968;&#31639;&#26415;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-complex.html">&lt;complex&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-complex.html"><span class="t-lines"><span>complex</span></span></a></div>
</div>
</td>
<td>&#22797;&#25968;&#31867;&#22411;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.95.B0.E5.80.BC.E6.95.B0.E7.BB.84">&#25968;&#20540;&#25968;&#32452;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-valarray.html">&lt;valarray&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-valarray.html"><span class="t-lines"><span>valarray</span></span></a></div>
</div>
</td>
<td>&#25968;&#20540;&#25968;&#32452;&#12289;&#25968;&#32452;&#25513;&#30721;&#21450;&#25968;&#32452;&#20999;&#29255;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
</table>
<h2><span class="mw-headline" id=".E6.95.B0.E5.80.BC.E7.AE.97.E6.B3.95">&#25968;&#20540;&#31639;&#27861;</span></h2>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-numeric.html"><tt>&lt;numeric&gt;</tt></a> &#25552;&#20379;&#19979;&#21015;&#25968;&#20540;&#31639;&#27861;&#65306;</p>
<h3><span class="mw-headline" id=".E5.9B.A0.E6.95.B0.E8.BF.90.E7.AE.97">&#22240;&#25968;&#36816;&#31639;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-numeric.html">&lt;numeric&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-gcd.html"><span class="t-lines"><span>gcd</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#20108;&#20010;&#25972;&#25968;&#26368;&#22823;&#20844;&#32422;&#25968;&#30340; <code>constexpr</code> &#20989;&#25968;&#27169;&#26495;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-lcm.html"><span class="t-lines"><span>lcm</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#36820;&#22238;&#20108;&#20010;&#25972;&#25968;&#26368;&#23567;&#20844;&#20493;&#25968;&#30340; <code>constexpr</code> &#20989;&#25968;&#27169;&#26495;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.8F.92.E5.80.BC.E8.BF.90.E7.AE.97">&#25554;&#20540;&#36816;&#31639;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-numeric.html">&lt;numeric&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-midpoint.html"><span class="t-lines"><span>midpoint</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20004;&#20010;&#25968;&#20540;&#25110;&#25351;&#38024;&#38388;&#30340;&#20013;&#28857;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-cmath.html">&lt;cmath&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-lerp.html"><span class="t-lines"><span>lerp</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#32447;&#24615;&#25554;&#20540;&#20989;&#25968;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.95.B0.E5.80.BC.E8.BF.90.E7.AE.97">&#25968;&#20540;&#36816;&#31639;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-numeric.html">&lt;numeric&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-iota.html"><span class="t-lines"><span>iota</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
</div>
</td>
<td>&#29992;&#20174;&#36215;&#22987;&#20540;&#24320;&#22987;&#36830;&#32493;&#36882;&#22686;&#30340;&#20540;&#22635;&#20805;&#19968;&#20010;&#33539;&#22260;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-accumulate.html"><span class="t-lines"><span>accumulate</span></span></a></div>
</div>
</td>
<td>&#23545;&#19968;&#20010;&#33539;&#22260;&#20869;&#30340;&#20803;&#32032;&#27714;&#21644;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-reduce.html"><span class="t-lines"><span>reduce</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#31867;&#20284; <span class="t-lc"><a href="cpp-algorithm-accumulate.html">std::accumulate</a></span>&#65292;&#20294;&#19981;&#20381;&#24207;&#25191;&#34892;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-transform_reduce.html"><span class="t-lines"><span>transform_reduce</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#24212;&#29992;&#19968;&#20010;&#20989;&#25968;&#23545;&#35937;&#65292;&#28982;&#21518;&#20197;&#20081;&#24207;&#35268;&#32422;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-inner_product.html"><span class="t-lines"><span>inner_product</span></span></a></div>
</div>
</td>
<td>&#35745;&#31639;&#20004;&#20010;&#33539;&#22260;&#30340;&#20803;&#32032;&#30340;&#20869;&#31215;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-adjacent_difference.html"><span class="t-lines"><span>adjacent_difference</span></span></a></div>
</div>
</td>
<td>&#35745;&#31639;&#33539;&#22260;&#20869;&#21508;&#30456;&#37051;&#20803;&#32032;&#20043;&#38388;&#30340;&#24046;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-partial_sum.html"><span class="t-lines"><span>partial_sum</span></span></a></div>
</div>
</td>
<td>&#35745;&#31639;&#33539;&#22260;&#20869;&#20803;&#32032;&#30340;&#37096;&#20998;&#21644;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-inclusive_scan.html"><span class="t-lines"><span>inclusive_scan</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#31867;&#20284; <span class="t-lc"><a href="cpp-algorithm-partial_sum.html">std::partial_sum</a></span>&#65292;&#31532; i &#20010;&#21644;&#20013;&#21253;&#21547;&#31532; i &#20010;&#36755;&#20837;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-exclusive_scan.html"><span class="t-lines"><span>exclusive_scan</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#31867;&#20284; <span class="t-lc"><a href="cpp-algorithm-partial_sum.html">std::partial_sum</a></span>&#65292;&#31532; i &#20010;&#21644;&#20013;&#25490;&#38500;&#31532; i &#20010;&#36755;&#20837;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-transform_inclusive_scan.html"><span class="t-lines"><span>transform_inclusive_scan</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#24212;&#29992;&#19968;&#20010;&#20989;&#25968;&#23545;&#35937;&#65292;&#28982;&#21518;&#36827;&#34892;&#21253;&#21547;&#25195;&#25551;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-algorithm-transform_exclusive_scan.html"><span class="t-lines"><span>transform_exclusive_scan</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx17">(C++17)</span></span></span></div>
</div>
</td>
<td>&#24212;&#29992;&#19968;&#20010;&#20989;&#25968;&#23545;&#35937;&#65292;&#28982;&#21518;&#36827;&#34892;&#25490;&#38500;&#25195;&#25551;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
</table>
<h2><span class="mw-headline" id=".E6.9D.82.E9.A1.B9">&#26434;&#39033;</span></h2>
<h3><span class="mw-headline" id=".E4.BC.AA.E9.9A.8F.E6.9C.BA.E6.95.B0.E7.94.9F.E6.88.90"><a href="cpp-numeric-random.html">&#20266;&#38543;&#26426;&#25968;&#29983;&#25104;</a></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-random.html"><tt>&lt;random&gt;</tt></a> &#23450;&#20041;<a href="cpp-numeric-random.html">&#20026;&#38543;&#26426;&#25968;&#29983;&#25104;&#22120;&#19982;&#25968;&#20540;&#20998;&#24067;</a>&#12290;&#22836;&#25991;&#20214; <code>cstdlib</code> &#20134;&#21253;&#21547; C &#39118;&#26684;&#38543;&#26426;&#25968;&#29983;&#25104;&#65292;&#36890;&#36807; <span class="t-lc"><a href="cpp-numeric-random-srand.html">std::srand</a></span> &#21644; <span class="t-lc"><a href="cpp-numeric-random-rand.html">std::rand</a></span> &#12290;</p>
<h3><span class="mw-headline" id=".E7.BC.96.E8.AF.91.E6.97.B6.E6.9C.89.E7.90.86.E6.95.B0.E7.AE.97.E6.9C.AF_.28C.2B.2B11_.E8.B5.B7.29"><a href="cpp-numeric-ratio.html">&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#31639;&#26415;</a> <span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-ratio.html"><tt>&lt;ratio&gt;</tt></a> &#25552;&#20379;<a href="cpp-numeric-ratio.html">&#25805;&#20316;&#21644;&#23384;&#20648;&#32534;&#35793;&#26102;&#27604;&#20363;&#30340;&#31867;&#22411;&#21644;&#20989;&#25968;</a>&#12290;</p>
<h3><span class="mw-headline" id=".E6.B5.AE.E7.82.B9.E7.8E.AF.E5.A2.83_.28C.2B.2B11_.E8.B5.B7.29"><a href="cpp-numeric-fenv.html">&#28014;&#28857;&#29615;&#22659;</a> <span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-cfenv.html"><tt>&lt;cfenv&gt;</tt></a> &#23450;&#20041;<a href="cpp-numeric-fenv.html">&#20851;&#31995;&#21040;&#24322;&#24120;&#28014;&#28857;&#29366;&#24577;&#30340;&#26631;&#24535;&#21644;&#20989;&#25968;</a>&#65292;&#20363;&#22914;&#19978;&#28322;&#21644;&#38500;&#20197;&#38646;&#12290;</p>
<h3><span class="mw-headline" id=".E4.BD.8D.E6.93.8D.E7.BA.B5_.28C.2B.2B20_.E8.B5.B7.29">&#20301;&#25805;&#32437; <span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></span></h3>
<p>&#22836;&#25991;&#20214; <a href="cpp-header-bit.html"><tt>&lt;bit&gt;</tt></a> &#25552;&#20379;&#25968;&#20010;&#35775;&#38382;&#12289;&#25805;&#32437;&#21450;&#22788;&#29702;&#21333;&#29420;&#20301;&#21644;&#20301;&#24207;&#21015;&#30340;&#20989;&#25968;&#27169;&#26495;&#12290;</p>
<table class="t-dsc-begin">
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-bit.html">&lt;bit&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc-header">
<td colspan="2">
<div>&#23450;&#20041;&#20110;&#21629;&#21517;&#31354;&#38388; <code>std</code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-bit_cast.html"><span class="t-lines"><span>bit_cast</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#23558;&#19968;&#20010;&#31867;&#22411;&#30340;&#23545;&#35937;&#34920;&#31034;&#37325;&#35299;&#37322;&#20026;&#21478;&#19968;&#31867;&#22411;&#30340;&#23545;&#35937;&#34920;&#31034;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-byteswap.html"><span class="t-lines"><span>byteswap</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx23">(C++23)</span></span></span></div>
</div>
</td>
<td>&#21453;&#36716;&#32473;&#23450;&#25972;&#25968;&#20540;&#20013;&#30340;&#23383;&#33410;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-has_single_bit.html"><span class="t-lines"><span>has_single_bit</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#26816;&#26597;&#19968;&#20010;&#25968;&#26159;&#21542;&#20026;&#20108;&#30340;&#25972;&#25968;&#27425;&#24130;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-bit_ceil.html"><span class="t-lines"><span>bit_ceil</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#23547;&#25214;&#19981;&#23567;&#20110;&#32473;&#23450;&#20540;&#30340;&#26368;&#23567;&#30340;&#20108;&#30340;&#25972;&#25968;&#27425;&#24130;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-bit_floor.html"><span class="t-lines"><span>bit_floor</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#23547;&#25214;&#19981;&#22823;&#20110;&#32473;&#23450;&#20540;&#30340;&#26368;&#22823;&#30340;&#20108;&#30340;&#25972;&#25968;&#27425;&#24130;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-bit_width.html"><span class="t-lines"><span>bit_width</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#23547;&#25214;&#34920;&#31034;&#32473;&#23450;&#20540;&#25152;&#38656;&#30340;&#26368;&#23567;&#20301;&#25968;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-rotl.html"><span class="t-lines"><span>rotl</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#35745;&#31639;&#36880;&#20301;&#24038;&#26059;&#36716;&#30340;&#32467;&#26524;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-rotr.html"><span class="t-lines"><span>rotr</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#35745;&#31639;&#36880;&#20301;&#21491;&#26059;&#36716;&#30340;&#32467;&#26524;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-countl_zero.html"><span class="t-lines"><span>countl_zero</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20174;&#26368;&#39640;&#20301;&#36215;&#35745;&#37327;&#36830;&#32493;&#30340; 0 &#20301;&#30340;&#25968;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-countl_one.html"><span class="t-lines"><span>countl_one</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20174;&#26368;&#39640;&#20301;&#36215;&#35745;&#37327;&#36830;&#32493;&#30340; 1 &#20301;&#30340;&#25968;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-countr_zero.html"><span class="t-lines"><span>countr_zero</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20174;&#26368;&#20302;&#20301;&#36215;&#35745;&#37327;&#36830;&#32493;&#30340; 0 &#20301;&#30340;&#25968;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-countr_one.html"><span class="t-lines"><span>countr_one</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#20174;&#26368;&#20302;&#20301;&#36215;&#35745;&#37327;&#36830;&#32493;&#30340; 1 &#20301;&#30340;&#25968;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-popcount.html"><span class="t-lines"><span>popcount</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#35745;&#37327;&#26080;&#31526;&#21495;&#25972;&#25968;&#20013;&#20026; 1 &#30340;&#20301;&#30340;&#25968;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-types-endian.html"><span class="t-lines"><span>endian</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx20">(C++20)</span></span></span></div>
</div>
</td>
<td>&#25351;&#31034;&#26631;&#37327;&#31867;&#22411;&#30340;&#31471;&#24207;<br />
<span class="t-mark">(&#26522;&#20030;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin"></table>
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