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<h1 id="firstHeading" class="firstHeading">&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#31639;&#26415;</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-numeric.html">numeric</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<p>&#31867;&#27169;&#26495; <code>std::ratio</code> &#21450;&#30456;&#20851;&#30340;&#27169;&#26495;&#25552;&#20379;&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#31639;&#26415;&#25903;&#25345;&#12290;&#27492;&#27169;&#26495;&#30340;&#27599;&#20010;&#23454;&#20363;&#21270;&#37117;&#20934;&#30830;&#34920;&#31034;&#20219;&#19968;&#26377;&#38480;&#26377;&#29702;&#25968;&#12290;</p>
<h3><span class="mw-headline" id=".E7.BC.96.E8.AF.91.E6.97.B6.E5.88.86.E6.95.B0">&#32534;&#35793;&#26102;&#20998;&#25968;</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-ratio.html">&lt;ratio&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio.html"><span class="t-lines"><span>ratio</span></span></a></div>
</div>
</td>
<td>&#34920;&#31034;&#20934;&#30830;&#30340;&#20998;&#25968;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
</table>
<p>&#26631;&#20934;&#24211;&#20026;&#25552;&#20379;&#25968;&#31181;&#23545;&#24212; SI &#27604;&#20363;&#30340;&#20415;&#21033; typedef &#65306;</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-ratio.html">&lt;ratio&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc-hitem">
<td>&#31867;&#22411;</td>
<td>&#23450;&#20041;</td>
</tr>
<tr class="t-dsc">
<td><code>yocto</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000000000</span><span class="sy1">&gt;</span></span></span> &#65292;&#33509; <span class="t-lc"><a href="cpp-types-integer.html">std::intmax_t</a></span> &#33021;&#34920;&#31034;&#20998;&#27597;</td>
</tr>
<tr class="t-dsc">
<td><code>zepto</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000000</span><span class="sy1">&gt;</span></span></span> &#65292;&#33509; <span class="t-lc"><a href="cpp-types-integer.html">std::intmax_t</a></span> &#33021;&#34920;&#31034;&#20998;&#27597;</td>
</tr>
<tr class="t-dsc">
<td><code>atto</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>femto</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>pico</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>nano</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>micro</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>milli</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>centi</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">100</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>deci</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">10</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>deca</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">10</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>hecto</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">100</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>kilo</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>mega</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>giga</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>tera</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>peta</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>exa</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span></td>
</tr>
<tr class="t-dsc">
<td><code>zetta</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span> &#65292;&#33509; <span class="t-lc"><a href="cpp-types-integer.html">std::intmax_t</a></span> &#33021;&#34920;&#31034;&#20998;&#23376;</td>
</tr>
<tr class="t-dsc">
<td><code>yotta</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-ratio-ratio.html"><span class="kw1522">std::<span class="me2">ratio</span></span></a><span class="sy1">&lt;</span><span class="nu0">1000000000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span></span></span> &#65292;&#33509; <span class="t-lc"><a href="cpp-types-integer.html">std::intmax_t</a></span> &#33021;&#34920;&#31034;&#20998;&#23376;</td>
</tr>
</table>
<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">&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#31639;&#26415;</span></h3>
<p>&#25552;&#20379;&#25968;&#20010;&#21035;&#21517;&#27169;&#26495;&#65292;&#23427;&#20204;&#22312;&#32534;&#35793;&#26102;&#36827;&#34892; <code>ratio</code> &#23454;&#20363;&#19978;&#30340;&#31639;&#26415;&#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-ratio.html">&lt;ratio&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_add.html"><span class="t-lines"><span>ratio_add</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>&#22312;&#32534;&#35793;&#26102;&#30456;&#21152;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;<br />
<span class="t-mark">(&#21035;&#21517;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_subtract.html"><span class="t-lines"><span>ratio_subtract</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>&#22312;&#32534;&#35793;&#26102;&#30456;&#20943;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;<br />
<span class="t-mark">(&#21035;&#21517;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_multiply.html"><span class="t-lines"><span>ratio_multiply</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>&#22312;&#32534;&#35793;&#26102;&#30456;&#20056;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;<br />
<span class="t-mark">(&#21035;&#21517;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_divide.html"><span class="t-lines"><span>ratio_divide</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>&#22312;&#32534;&#35793;&#26102;&#30456;&#38500;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;<br />
<span class="t-mark">(&#21035;&#21517;&#27169;&#26495;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E7.BC.96.E8.AF.91.E6.97.B6.E6.9C.89.E7.90.86.E6.95.B0.E6.AF.94.E8.BE.83">&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#27604;&#36739;</span></h3>
<p>&#25552;&#20379;&#25968;&#20010;&#31867;&#27169;&#26495;&#65292;&#23427;&#20204;&#22312;&#32534;&#35793;&#26102;&#36827;&#34892; <code>ratio</code> &#23454;&#20363;&#19978;&#30340;&#27604;&#36739;&#36816;&#31639;&#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-ratio.html">&lt;ratio&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_equal.html"><span class="t-lines"><span>ratio_equal</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;&#30456;&#31561;&#24615;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_not_equal.html"><span class="t-lines"><span>ratio_not_equal</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;&#19981;&#30456;&#31561;&#24615;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_less.html"><span class="t-lines"><span>ratio_less</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;<i>&#23567;&#20110;</i>&#20851;&#31995;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_less_equal.html"><span class="t-lines"><span>ratio_less_equal</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;<i>&#23567;&#20110;&#25110;&#31561;&#20110;</i>&#20851;&#31995;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_greater.html"><span class="t-lines"><span>ratio_greater</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;<i>&#22823;&#20110;</i>&#20851;&#31995;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-numeric-ratio-ratio_greater_equal.html"><span class="t-lines"><span>ratio_greater_equal</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>&#22312;&#32534;&#35793;&#26102;&#27604;&#36739;&#20004;&#20010; <code>ratio</code> &#23545;&#35937;&#30340;<i>&#22823;&#20110;&#25110;&#31561;&#20110;</i>&#20851;&#31995;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
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