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<h1 id="firstHeading" class="firstHeading">operator+,-,*,/,%<small>(std::chrono::duration)</small></h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-chrono.html">chrono</a>&lrm; | <a href="cpp-chrono-duration.html">duration</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period1, <span class="kw1">class</span> Rep2, <span class="kw1">class</span> Period2 <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span>, duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;&gt;</span><span class="sy4">::</span><span class="me2">type</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">+</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(1)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period1, <span class="kw1">class</span> Rep2, <span class="kw1">class</span> Period2 <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span>, duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;&gt;</span><span class="sy4">::</span><span class="me2">type</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">-</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period, <span class="kw1">class</span> Rep2 <span class="sy1">&gt;</span><br /></span>
<p>duration<span class="sy1">&lt;</span><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1,Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span>, Period<span class="sy1">&gt;</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">*</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> d,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> Rep2<span class="sy3">&amp;</span> s <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Rep2, <span class="kw1">class</span> Period <span class="sy1">&gt;</span><br /></span>
<p>duration<span class="sy1">&lt;</span><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1,Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span>, Period<span class="sy1">&gt;</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">*</span><span class="br0">(</span> <span class="kw4">const</span> Rep1<span class="sy3">&amp;</span> s,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep2,Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> d <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period, <span class="kw1">class</span> Rep2 <span class="sy1">&gt;</span><br /></span>
<p>duration<span class="sy1">&lt;</span><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1,Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span>, Period<span class="sy1">&gt;</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">/</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> d,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> Rep2<span class="sy3">&amp;</span> s <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period1, <span class="kw1">class</span> Rep2, <span class="kw1">class</span> Period2 <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1,Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">/</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period, <span class="kw1">class</span> Rep2 <span class="sy1">&gt;</span><br /></span>
<p>duration<span class="sy1">&lt;</span><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1,Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span>, Period<span class="sy1">&gt;</span><br />
&nbsp; &nbsp; <span class="kw4">constexpr</span> operator<span class="sy2">%</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1, Period<span class="sy1">&gt;</span><span class="sy3">&amp;</span> d,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> Rep2<span class="sy3">&amp;</span> s <span class="br0">)</span><span class="sy4">;</span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> Rep1, <span class="kw1">class</span> Period1, <span class="kw1">class</span> Rep2, <span class="kw1">class</span> Period2 <span class="sy1">&gt;</span><br /></span>
<p><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span>, duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;&gt;</span><span class="sy4">::</span><span class="me2">type</span><br />
<span class="kw4">constexpr</span> operator<span class="sy2">%</span><span class="br0">(</span> <span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep1,Period1<span class="sy1">&gt;</span><span class="sy3">&amp;</span> lhs,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span class="kw4">const</span> duration<span class="sy1">&lt;</span>Rep2,Period2<span class="sy1">&gt;</span><span class="sy3">&amp;</span> rhs <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(8)</td>
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<p>&#22312;&#20108;&#20010;&#26102;&#38271;&#25110;&#26102;&#38271;&#21644;&#35745;&#27425;&#25968;&#20043;&#38388;&#36827;&#34892;&#22522;&#26412;&#31639;&#26415;&#36816;&#31639;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#36716;&#25442;&#20108;&#20010;&#26102;&#38271;&#21040;&#20854;&#20849;&#29992;&#31867;&#22411;&#65292;&#24182;&#21019;&#24314;&#35745;&#27425;&#25968;&#20026;&#36716;&#25442;&#21518;&#35745;&#27425;&#25968;&#20043;&#21644;&#30340;&#26102;&#38271;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#36716;&#25442;&#20108;&#20010;&#26102;&#38271;&#21040;&#20854;&#20849;&#29992;&#31867;&#22411;&#65292;&#24182;&#21019;&#24314;&#35745;&#27425;&#25968;&#20026;&#36716;&#25442;&#21518;&#20174; <code>lhs</code> &#30340;&#35745;&#27425;&#25968;&#20943;&#21435; <code>rhs</code> &#30340;&#35745;&#27425;&#25968;&#30340;&#26102;&#38271;&#12290;</div>
<div class="t-li1"><span class="t-li">3-4)</span> &#36716;&#25442;&#26102;&#38271; <code>d</code> &#21040;&#20854; <code>rep</code> &#20026; <code>Rep1</code> &#19982; <code>Rep2</code> &#20043;&#38388;&#30340;&#20849;&#29992;&#31867;&#22411;&#30340;&#26102;&#38271;&#65292;&#24182;&#23558;&#36716;&#25442;&#21518;&#30340;&#35745;&#27425;&#25968;&#20056; <code>s</code> &#12290;&#36825;&#20123;&#37325;&#36733;&#20165;&#33509; <code>s</code> &#21487;&#36716;&#25442;&#21040; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1, Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span></span></span> &#25165;&#21442;&#19982;&#37325;&#36733;&#20915;&#35758;&#12290;</div>
<div class="t-li1"><span class="t-li">5)</span> &#36716;&#25442;&#26102;&#38271; <code>d</code> &#21040;&#20854; <code>rep</code> &#20026; <code>Rep1</code> &#19982; <code>Rep2</code> &#20043;&#38388;&#30340;&#20849;&#29992;&#31867;&#22411;&#30340;&#26102;&#38271;&#65292;&#24182;&#23558;&#36716;&#25442;&#21518;&#30340;&#35745;&#27425;&#25968;&#38500;&#20197; <code>s</code> &#12290;&#27492;&#37325;&#36733;&#20165;&#33509; <code>s</code> &#21487;&#36716;&#25442;&#21040; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1, Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span></span></span> &#19988; <code>Rep2</code> &#19981;&#26159; <code>duration</code> &#30340;&#29305;&#21270;&#25165;&#21442;&#19982;&#37325;&#36733;&#20915;&#35758;&#12290;</div>
<div class="t-li1"><span class="t-li">6)</span> &#36716;&#25442;&#20108;&#20010;&#26102;&#38271;&#21040;&#20854;&#20849;&#29992;&#31867;&#22411;&#65292;&#24182;&#23558; <code>lhs</code> &#36716;&#25442;&#21518;&#30340;&#35745;&#27425;&#25968;&#38500;&#20197; <code>rhs</code> &#36716;&#25442;&#21518;&#30340;&#35745;&#27425;&#25968;&#12290;&#27880;&#24847;&#27492;&#36816;&#31639;&#31526;&#30340;&#36820;&#22238;&#20540;&#19981;&#26159;&#26102;&#38271;&#12290;</div>
<div class="t-li1"><span class="t-li">7)</span> &#36716;&#25442;&#26102;&#38271; <code>d</code> &#21040;&#20854; <code>rep</code> &#20026; <code>Rep1</code> &#19982; <code>Rep2</code> &#20043;&#38388;&#30340;&#20849;&#29992;&#31867;&#22411;&#30340;&#26102;&#38271;&#65292;&#24182;&#21019;&#24314;&#35745;&#27425;&#25968;&#20026;&#27492;&#26102;&#38271;&#30340;&#35745;&#27425;&#25968;&#38500;&#20197; <code>s</code> &#30340;&#26102;&#38271;&#12290;&#27492;&#37325;&#36733;&#20165;&#33509; <code>s</code> &#21487;&#36716;&#25442;&#21040; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw1">typename</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>Rep1, Rep2<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span></span></span> &#19988; <code>Rep2</code> &#19981;&#26159; <code>duration</code> &#30340;&#29305;&#21270;&#25165;&#21442;&#19982;&#37325;&#36733;&#20915;&#35758;&#12290;</div>
<div class="t-li1"><span class="t-li">8)</span> &#36716;&#25442;&#20108;&#20010;&#26102;&#38271;&#21040;&#20854;&#20849;&#29992;&#31867;&#22411;&#65292;&#24182;&#21019;&#24314;&#35745;&#27425;&#25968;&#20026;&#36716;&#25442;&#21518;&#35745;&#27425;&#25968;&#21462;&#20313;&#30340;&#26102;&#38271;&#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<table class="t-par-begin">
<tr class="t-par">
<td>lhs</td>
<td>-</td>
<td>&#36816;&#31639;&#31526;&#24038;&#20391;&#30340; duration</td>
</tr>
<tr class="t-par">
<td>rhs</td>
<td>-</td>
<td>&#36816;&#31639;&#31526;&#21491;&#20391;&#30340; duration</td>
</tr>
<tr class="t-par">
<td>d</td>
<td>-</td>
<td>&#28151;&#21512;&#21442;&#25968;&#36816;&#31639;&#31526;&#30340;&#26102;&#38271;&#21442;&#25968;</td>
</tr>
<tr class="t-par">
<td>s</td>
<td>-</td>
<td>&#28151;&#21512;&#21442;&#25968;&#36816;&#31639;&#31526;&#30340;&#35745;&#27425;&#21442;&#25968;</td>
</tr>
</table>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#20551;&#35774; <span class="t-c"><span class="mw-geshi cpp source-cpp">CD</span></span> &#20026;&#20989;&#25968;&#36820;&#22238;&#31867;&#22411;&#19988; <span class="t-c"><span class="mw-geshi cpp source-cpp">CR<span class="sy1">&lt;</span>A, B<span class="sy1">&gt;</span> <span class="sy1">=</span> <a href="cpp-types-common_type.html"><span class="kw635">std::<span class="me2">common_type</span></span></a><span class="sy1">&lt;</span>A, B<span class="sy1">&gt;</span><span class="sy4">::</span><span class="me2">type</span></span></span> &#65292;&#21017;&#65306;</p>
<div class="t-li1"><span class="t-li">1)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>lhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">+</span> CD<span class="br0">(</span>rhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">2)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>lhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">-</span> CD<span class="br0">(</span>rhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">3-4)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>d<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">*</span> s<span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">5)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>d<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">/</span> s<span class="br0">)</span>.</span></span></div>
<div class="t-li1"><span class="t-li">6)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>lhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">/</span> CD<span class="br0">(</span>rhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span></span></span> &#65288;&#27492;&#36816;&#31639;&#31526;&#30340;&#36820;&#22238;&#31867;&#22411;&#38750; duration &#65289;</div>
<div class="t-li1"><span class="t-li">7)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>d<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">%</span> s<span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">8)</span> <span class="t-c"><span class="mw-geshi cpp source-cpp">CD<span class="br0">(</span>CD<span class="br0">(</span>lhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy2">%</span> CD<span class="br0">(</span>rhs<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<div class="t-example-live-link"></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="co2">#include &lt;chrono&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="co1">// &#31616;&#21333;&#31639;&#26415;</span>
<a href="cpp-chrono-duration.html"><span class="kw997">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">seconds</span></span></a> s <span class="sy1">=</span> <a href="cpp-chrono-duration.html"><span class="kw999">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">hours</span></span></a><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span>
<span class="sy2">+</span> <span class="nu0">2</span><span class="sy2">*</span><a href="cpp-chrono-duration.html"><span class="kw998">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">minutes</span></span></a><span class="br0">(</span><span class="nu0">10</span><span class="br0">)</span>
<span class="sy2">+</span> <a href="cpp-chrono-duration.html"><span class="kw997">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">seconds</span></span></a><span class="br0">(</span><span class="nu0">70</span><span class="br0">)</span><span class="sy2">/</span><span class="nu0">10</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;1 hour + 2*10 min + 70/10 sec = &quot;</span> <span class="sy1">&lt;&lt;</span> s.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; seconds<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="co1">// &#26102;&#38271;&#38500;&#20197;&#19968;&#20010;&#25968;&#21644;&#26102;&#38271;&#38500;&#20197;&#21478;&#19968;&#26102;&#38271;&#30340;&#21306;&#21035;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Dividing that by 2 minutes gives &quot;</span>
<span class="sy1">&lt;&lt;</span> s <span class="sy2">/</span> <a href="cpp-chrono-duration.html"><span class="kw998">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">minutes</span></span></a><span class="br0">(</span><span class="nu0">2</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Dividing that by 2 gives &quot;</span>
<span class="sy1">&lt;&lt;</span> <span class="br0">(</span>s <span class="sy2">/</span> <span class="nu0">2</span><span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; seconds<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="co1">// &#20313;&#25968;&#36816;&#31639;&#31526;&#22312;&#30830;&#23450;&#27492;&#29305;&#23450;&#26102;&#38271;&#22312;&#26102;&#38388;&#26694;&#26550;&#30340;&#22330;&#21512;&#26377;&#29992;&#65292;</span>
<span class="co1">// &#20363;&#22914;&#65292;&#25286;&#20998;&#23427;&#20026;&#26102;&#12289;&#20998;&#21644;&#31186;&#65306;</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1">&lt;&lt;</span> s.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; seconds is &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-chrono-duration-duration_cast.html"><span class="kw1000">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">duration_cast</span></span></a><span class="sy1">&lt;</span><a href="cpp-chrono-duration.html"><span class="kw999">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">hours</span></span></a><span class="sy1">&gt;</span><span class="br0">(</span>
s
<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; hours, &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-chrono-duration-duration_cast.html"><span class="kw1000">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">duration_cast</span></span></a><span class="sy1">&lt;</span><a href="cpp-chrono-duration.html"><span class="kw998">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">minutes</span></span></a><span class="sy1">&gt;</span><span class="br0">(</span>
s <span class="sy2">%</span> <a href="cpp-chrono-duration.html"><span class="kw999">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">hours</span></span></a><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span>
<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; minutes, &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-chrono-duration-duration_cast.html"><span class="kw1000">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">duration_cast</span></span></a><span class="sy1">&lt;</span><a href="cpp-chrono-duration.html"><span class="kw997">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">seconds</span></span></a><span class="sy1">&gt;</span><span class="br0">(</span>
s <span class="sy2">%</span> <a href="cpp-chrono-duration.html"><span class="kw998">std::<span class="me2">chrono</span><span class="sy4">::</span><span class="me2">minutes</span></span></a><span class="br0">(</span><span class="nu0">1</span><span class="br0">)</span>
<span class="br0">)</span>.<span class="me1">count</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; seconds<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
</div>
<p>&#36755;&#20986;&#65306;</p>
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<div class="text source-text">
<pre class="de1">1 hour + 2*10 min + 70/10 sec = 4807 seconds
Dividing that by 2 minutes gives 40
Dividing that by 2 gives 2403 seconds
4807 seconds is 1 hours, 20 minutes, 7 seconds</pre></div>
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<h3><span class="mw-headline" id=".E7.BC.BA.E9.99.B7.E6.8A.A5.E5.91.8A">&#32570;&#38519;&#25253;&#21578;</span></h3>
<p>&#19979;&#21015;&#26356;&#25913;&#34892;&#20026;&#30340;&#32570;&#38519;&#25253;&#21578;&#36861;&#28335;&#22320;&#24212;&#29992;&#20110;&#20197;&#21069;&#20986;&#29256;&#30340; C++ &#26631;&#20934;&#12290;</p>
<table class="dsctable" style="font-size:0.8em">
<tr>
<th>DR</th>
<th>&#24212;&#29992;&#20110;</th>
<th>&#20986;&#29256;&#26102;&#30340;&#34892;&#20026;</th>
<th>&#27491;&#30830;&#34892;&#20026;</th>
</tr>
<tr>
<td><a rel="nofollow" class="external text" href="https://cplusplus.github.io/LWG/issue3050">LWG 3050</a></td>
<td>C++11</td>
<td>&#21487;&#36716;&#25442;&#24615;&#21046;&#32422;&#20351;&#29992;&#38750; const &#20129;&#20540;</td>
<td>&#26367;&#32780;&#20351;&#29992; const &#24038;&#20540;</td>
</tr>
</table>
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