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<title>&#26631;&#20934;&#24211;&#22836;&#25991;&#20214; &lt;ratio&gt;</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;ratio&gt;</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-header.html">header</a></span></div>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-numeric-ratio.html">&#32534;&#35793;&#26102;&#26377;&#29702;&#25968;&#31639;&#26415;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<td colspan="2">
<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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</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;&#31934;&#30830;&#30340;&#26377;&#29702;&#20998;&#25968;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E7.AE.97.E6.9C.AF">&#31639;&#26415;</span></h5>
</td>
</tr>
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<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>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E6.AF.94.E8.BE.83">&#27604;&#36739;</span></h5>
</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>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=".E5.B8.B8.E9.87.8F">&#24120;&#37327;</span></h5>
</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=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="cpp source-cpp">
<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="co1">// &#31867;&#27169;&#26495; ratio</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span>intmax_t N, intmax_t D <span class="sy1">=</span> <span class="nu0">1</span><span class="sy1">&gt;</span>
<span class="kw1">class</span> ratio <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span>num, den<span class="sy1">&gt;</span> type<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> intmax_t num<span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">constexpr</span> intmax_t den<span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="co1">// ratio &#31639;&#26415;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">using</span> ratio_add <span class="sy1">=</span> <span class="coMULTI">/*ratio*/</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">using</span> ratio_subtract <span class="sy1">=</span> <span class="coMULTI">/*ratio*/</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">using</span> ratio_multiply <span class="sy1">=</span> <span class="coMULTI">/*ratio*/</span><span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">using</span> ratio_divide <span class="sy1">=</span> <span class="coMULTI">/*ratio*/</span><span class="sy4">;</span>
<span class="co1">// ratio &#27604;&#36739;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_equal<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_not_equal<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_less<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_less_equal<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_greater<span class="sy4">;</span>
<span class="kw1">template</span> <span class="sy1">&lt;</span><span class="kw1">class</span> R1, <span class="kw1">class</span> R2<span class="sy1">&gt;</span> <span class="kw1">struct</span> ratio_greater_equal<span class="sy4">;</span>
<span class="co1">// &#20415;&#21033; SI typedef</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000000000</span><span class="sy1">&gt;</span> yocto<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000000</span><span class="sy1">&gt;</span> zepto<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000000</span><span class="sy1">&gt;</span> atto<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000000</span><span class="sy1">&gt;</span> femto<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000000</span><span class="sy1">&gt;</span> pico<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000000</span><span class="sy1">&gt;</span> nano<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000000</span><span class="sy1">&gt;</span> micro<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">1000</span><span class="sy1">&gt;</span> milli<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">100</span><span class="sy1">&gt;</span> centi<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1</span>, <span class="nu0">10</span><span class="sy1">&gt;</span> deci<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">10</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> deca<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">100</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> hecto<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> kilo<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> mega<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> giga<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> tera<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> peta<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> exa<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span> <span class="nu0">1000000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> zetta<span class="sy4">;</span>
<span class="kw1">typedef</span> ratio<span class="sy1">&lt;</span><span class="nu0">1000000000000000000000000</span>, <span class="nu0">1</span><span class="sy1">&gt;</span> yotta<span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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