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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>num_get</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></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">template</span><span class="sy1">&lt;</span><br /></span>
<p>&nbsp; &nbsp; <span class="kw1">class</span> CharT,<br />
&nbsp; &nbsp; <span class="kw1">class</span> InputIt <span class="sy1">=</span> <a href="cpp-iterator-istreambuf_iterator.html"><span class="kw669">std::<span class="me2">istreambuf_iterator</span></span></a><span class="sy1">&lt;</span>CharT<span class="sy1">&gt;</span><br /></p>
<span class="sy1">&gt;</span> <span class="kw1">class</span> num_get<span class="sy4">;</span></div>
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<p>&#31867; <code>std::num_get</code> &#23553;&#35013;&#20998;&#26512;&#25968;&#20540;&#30340;&#23383;&#31526;&#20018;&#34920;&#31034;&#30340;&#35268;&#21017;&#12290;&#29305;&#21035;&#26159;&#25903;&#25345;&#31867;&#22411; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">bool</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">short</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">int</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">long</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">long</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">long</span> <span class="kw4">long</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">unsigned</span> <span class="kw4">long</span> <span class="kw4">long</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">float</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">double</span></span></span> &#12289; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">long</span> <span class="kw4">double</span></span></span> &#21450; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span><span class="sy2">*</span></span></span> &#12290;&#26631;&#20934;&#26684;&#24335;&#21270;&#36755;&#20837;&#36816;&#31639;&#31526;&#65288;&#22914; <span class="t-c"><span class="mw-geshi cpp source-cpp">cin <span class="sy1">&gt;&gt;</span> n<span class="sy4">;</span></span></span> &#65289;&#29992; I/O &#27969;&#30340; locale &#30340; <code>std::num_get</code> &#24179;&#38754;&#20998;&#26512;&#25968;&#23383;&#30340;&#25991;&#26412;&#34920;&#31034;&#12290;</p>
<div class="t-inheritance-diagram">
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<area href="cpp-locale-locale-facet.html" shape="rect" coords="5,6,107,39" alt="cpp/locale/locale/facet" /></map><img alt="std-num get-inheritance.svg" src="std-num_get-inheritance.svg" width="265" height="45" usemap="#ImageMap_1_1136519419" /></div>
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<p><span style="font-size:0.7em; line-height:130%">&#32487;&#25215;&#22270;</span></p>
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<h3><span class="mw-headline" id=".E7.B1.BB.E5.9E.8B.E8.A6.81.E6.B1.82">&#31867;&#22411;&#35201;&#27714;</span></h3>
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<code>InputIt</code> &#24517;&#39035;&#28385;&#36275;<a href="cpp-named_req-InputIterator.html"><span style="font-style:italic">&#32769;&#24335;&#36755;&#20837;&#36845;&#20195;&#22120;</span> <span style="font-family: Georgia, &#39;DejaVu Serif&#39;, serif; font-style:italic">(LegacyInputIterator)</span></a> &#30340;&#35201;&#27714;&#12290;</td>
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<h3><span class="mw-headline" id=".E7.89.B9.E5.8C.96">&#29305;&#21270;</span></h3>
<p>&#26631;&#20934;&#24211;&#25552;&#20379;&#20108;&#20010;&#29420;&#31435;&#65288;&#19981;&#20381;&#36182;&#26412;&#22320;&#29615;&#22659;&#65289;&#30340;&#20840;&#29305;&#21270;&#21644;&#20108;&#20010;&#37096;&#20998;&#29305;&#21270;&#65306;</p>
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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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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">num_get</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span></td>
<td>&#21019;&#24314;&#25968;&#23383;&#30340;&#31364;&#23383;&#31526;&#20018;&#20998;&#26512;</td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">num_get</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span></td>
<td>&#21019;&#24314;&#25968;&#23383;&#30340;&#23485;&#23383;&#31526;&#20018;&#20998;&#26512;</td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">num_get</span><span class="sy1">&lt;</span><span class="kw4">char</span>, InputIt<span class="sy1">&gt;</span></span></span></td>
<td>&#21019;&#24314;&#25968;&#23383;&#30340;&#20351;&#29992;&#23450;&#21046;&#36755;&#20837;&#36845;&#20195;&#22120;&#30340;&#31364;&#23383;&#31526;&#20018;&#20998;&#26512;</td>
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<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">num_get</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span>, InputIt<span class="sy1">&gt;</span></span></span></td>
<td>&#21019;&#24314;&#25968;&#23383;&#30340;&#20351;&#29992;&#23450;&#21046;&#36755;&#20837;&#36845;&#20195;&#22120;&#30340;&#23485;&#23383;&#31526;&#20018;&#20998;&#26512;</td>
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<p>&#21478;&#22806;&#65292; C++ &#31243;&#24207;&#20013;&#26500;&#36896;&#30340;&#27599;&#20010; locale &#23545;&#35937;&#37117;&#23454;&#35013;&#36825;&#20123;&#29305;&#21270;&#30340;&#20854;&#33258;&#36523;&#65288;&#26412;&#22320;&#29615;&#22659;&#38480;&#23450;&#65289;&#29256;&#26412;&#12290;</p>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E7.B1.BB.E5.9E.8B">&#25104;&#21592;&#31867;&#22411;</span></h3>
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<td>&#25104;&#21592;&#31867;&#22411;</td>
<td>&#23450;&#20041;</td>
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<td><code>char_type</code></td>
<td><code>CharT</code></td>
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<td><code>iter_type</code></td>
<td><code>InputIt</code></td>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-locale-num_get-num_get.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
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<td>&#26500;&#36896;&#26032;&#30340; num_get &#24179;&#38754;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-locale-num_get-~num_get.html"><span class="t-lines"><span>(&#26512;&#26500;&#20989;&#25968;)</span></span></a></div>
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<td>&#26512;&#26500; num_get &#24179;&#38754;<br />
<span class="t-mark">(&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-locale-num_get-get.html"><span class="t-lines"><span>get</span></span></a></div>
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<td>&#35843;&#29992; <code>do_get</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.AF.B9.E8.B1.A1">&#25104;&#21592;&#23545;&#35937;</span></h3>
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<div><span class="t-lines"><span><span class="t-dsc-small">static std::locale::id</span> id</span></span></div>
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<td>locale &#30340; <i>id</i><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#23545;&#35937;)</span></td>
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<h3><span class="mw-headline" id=".E5.8F.97.E4.BF.9D.E6.8A.A4.E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;</span></h3>
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<div><a href="cpp-locale-num_get-get.html"><span class="t-lines"><span>do_get</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#20174;&#36755;&#20837;&#27969;&#20998;&#26512;&#25968;&#23383;<br />
<span class="t-mark">(&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<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;iostream&gt;</span>
<span class="co2">#include &lt;locale&gt;</span>
<span class="co2">#include &lt;string&gt;</span>
<span class="co2">#include &lt;sstream&gt;</span>
<span class="co2">#include &lt;iterator&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> de_double <span class="sy1">=</span> <span class="st0">&quot;1.234.567,89&quot;</span><span class="sy4">;</span>
<a href="cpp-string-basic_string.html"><span class="kw1230">std::<span class="me2">string</span></span></a> us_double <span class="sy1">=</span> <span class="st0">&quot;1,234,567.89&quot;</span><span class="sy4">;</span>
<span class="co1">// &#27969;&#20351;&#29992;&#20998;&#26512;</span>
<a href="cpp-io-basic_istringstream.html"><span class="kw1735">std::<span class="me2">istringstream</span></span></a> de_in<span class="br0">(</span>de_double<span class="br0">)</span><span class="sy4">;</span>
de_in.<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;de_DE&quot;</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">double</span> f1<span class="sy4">;</span>
de_in <span class="sy1">&gt;&gt;</span> f1<span class="sy4">;</span>
<a href="cpp-io-basic_istringstream.html"><span class="kw1735">std::<span class="me2">istringstream</span></span></a> us_in<span class="br0">(</span>de_double<span class="br0">)</span><span class="sy4">;</span>
us_in.<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>
<span class="kw4">double</span> f2<span class="sy4">;</span>
us_in <span class="sy1">&gt;&gt;</span> f2<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;Parsing &quot;</span> <span class="sy1">&lt;&lt;</span> de_double <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; as double gives &quot;</span> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-fixed.html"><span class="kw1784">std::<span class="me2">fixed</span></span></a>
<span class="sy1">&lt;&lt;</span> f1 <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; in de_DE locale and &quot;</span> <span class="sy1">&lt;&lt;</span> f2 <span class="sy1">&lt;&lt;</span> <span class="st0">&quot; in en_US<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="co1">// &#30452;&#25509;&#20351;&#29992;&#24179;&#38754;</span>
<a href="cpp-io-basic_istringstream.html"><span class="kw1735">std::<span class="me2">istringstream</span></span></a> s3<span class="br0">(</span>us_double<span class="br0">)</span><span class="sy4">;</span>
s3.<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>
<span class="kw4">auto</span><span class="sy3">&amp;</span> f <span class="sy1">=</span> <a href="cpp-locale-use_facet.html"><span class="kw1897">std::<span class="me2">use_facet</span></span></a><span class="sy1">&lt;</span>std<span class="sy4">::</span><span class="me2">num_get</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;&gt;</span><span class="br0">(</span>s3.<span class="me1">getloc</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-iterator-istreambuf_iterator.html"><span class="kw669">std::<span class="me2">istreambuf_iterator</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> beg<span class="br0">(</span>s3<span class="br0">)</span>, end<span class="sy4">;</span>
<span class="kw4">double</span> f3<span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">ios</span><span class="sy4">::</span><span class="me2">iostate</span> err<span class="sy4">;</span>
f.<span class="me1">get</span><span class="br0">(</span>beg, end, s3, err, f3<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;parsing &quot;</span> <span class="sy1">&lt;&lt;</span> us_double
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot; as double using raw en_US facet gives &quot;</span> <span class="sy1">&lt;&lt;</span> f3 <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>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">Parsing 1.234.567,89 as double gives 1234567.890000 in de_DE locale and 1.234000 in en_US
parsing 1,234,567.89 as double using raw en_US facet gives 1234567.890000</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-numpunct.html"><span class="t-lines"><span>numpunct</span></span></a></div>
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</td>
<td>&#23450;&#20041;&#25968;&#20540;&#26631;&#28857;&#35268;&#21017;<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-locale-num_put.html"><span class="t-lines"><span>num_put</span></span></a></div>
</div>
</td>
<td>&#26684;&#24335;&#21270;&#25968;&#20540;&#20026;&#23383;&#31526;&#24207;&#21015;&#20197;&#36755;&#20986;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<td>
<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_istream-operator_gtgt.html"><span class="t-lines"><span>operator&gt;&gt;</span></span></a></div>
</div>
</td>
<td>&#25552;&#21462;&#24102;&#26684;&#24335;&#25968;&#25454;<br />
<span class="t-mark">(<code>std::basic_istream&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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