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<title>std::moneypunct&lt;CharT,International&gt;::frac_digits, do_frac_digits</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::moneypunct&lt;CharT,International&gt;::</span>frac_digits, do_frac_digits</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-locale.html">locale</a>&lrm; | <a href="cpp-locale-moneypunct.html">moneypunct</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-locale.html">&lt;locale&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">public</span><span class="sy4">:</span><br />
<span class="kw4">int</span> frac_digits<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span><br />
<span class="kw1">virtual</span> <span class="kw4">int</span> do_frac_digits<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<div class="t-li1"><span class="t-li">1)</span> &#20844;&#24320;&#25104;&#21592;&#20989;&#25968;&#65292;&#35843;&#29992;&#26368;&#32456;&#23548;&#20986;&#31867;&#30340;&#25104;&#21592;&#20989;&#25968; <code>do_frac_digits</code> &#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#36820;&#22238;&#25171;&#21360;&#36135;&#24065;&#20540;&#26102;&#20986;&#29616;&#22312;&#23567;&#25968;&#28857;&#21518;&#30340;&#20301;&#25968;&#12290;</div>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#35201;&#26174;&#31034;&#20110;&#23567;&#25968;&#28857;&#21518;&#30340;&#20301;&#25968;&#12290;&#22312;&#24120;&#29992;&#30340;&#32654;&#22269;&#26412;&#22320;&#29615;&#22659;&#20013;&#65292;&#27492;&#20026;&#20540; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="nu0">2</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;locale&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="co2">#include &lt;iomanip&gt;</span>
<span class="co2">#include &lt;iterator&gt;</span>
<span class="kw1">struct</span> space_out <span class="sy4">:</span> <a href="cpp-locale-moneypunct.html"><span class="kw1972">std::<span class="me2">moneypunct</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> <span class="br0">{</span>
pattern do_pos_format<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="br0">{</span> <span class="br0">{</span>value, none, none, none<span class="br0">}</span> <span class="br0">}</span><span class="sy4">;</span><span class="br0">}</span>
<span class="kw4">int</span> do_frac_digits<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="nu0">0</span><span class="sy4">;</span> <span class="br0">}</span>
char_type do_thousands_sep<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="st0">&#39; &#39;</span><span class="sy4">;</span><span class="br0">}</span>
string_type do_grouping<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span> <span class="br0">{</span> <span class="kw1">return</span> <span class="st0">&quot;<span class="es5">\002</span>&quot;</span><span class="sy4">;</span><span class="br0">}</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a>.<span class="me1">imbue</span><span class="br0">(</span><a href="cpp-locale-locale.html"><span class="kw1894">std::<span class="me2">locale</span></span></a><span class="br0">(</span><span class="st0">&quot;en_US.UTF-8&quot;</span><span class="br0">)</span><span class="br0">)</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;american locale: &quot;</span> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-showbase.html"><span class="kw1766">std::<span class="me2">showbase</span></span></a>
<span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-put_money.html"><span class="kw1799">std::<span class="me2">put_money</span></span></a><span class="br0">(</span><span class="nu16">12345678.0</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="me1">imbue</span><span class="br0">(</span><a href="cpp-locale-locale.html"><span class="kw1894">std::<span class="me2">locale</span></span></a><span class="br0">(</span><a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a>.<span class="me1">getloc</span><span class="br0">(</span><span class="br0">)</span>, new space_out<span class="br0">)</span><span class="br0">)</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;locale with modified moneypunct: &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-put_money.html"><span class="kw1799">std::<span class="me2">put_money</span></span></a><span class="br0">(</span><span class="nu16">12345678.0</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>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">american locale: $123,456.78
locale with modified moneypunct: 12 34 56 78</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-locale-moneypunct-thousands_sep.html"><span class="t-lines"><span>do_thousands_sep</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#25552;&#20379;&#29992;&#20316;&#21315;&#20998;&#38548;&#31526;&#30340;&#23383;&#31526;<br />
<span class="t-mark">(&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-locale-moneypunct-decimal_point.html"><span class="t-lines"><span>do_decimal_point</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#25552;&#20379;&#29992;&#20316;&#23567;&#25968;&#28857;&#30340;&#23383;&#31526;<br />
<span class="t-mark">(&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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