klarkxy/hustoj
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
9b13c95e8a4889474d797b7c1d82b6045d766425
hustoj/web/cppreference-zh/chmhelp/cpp-locale-numpunct.html
klarkxy 196e706fe4 上传cppreference
2025-08-01 12:57:54 +08:00

265 lines
16 KiB
HTML
Raw Blame History

<!DOCTYPE html>
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>std::numpunct</title>
<link rel="stylesheet" href="ext.css" />
<link rel="stylesheet" href="site_modules.css" />
</head>
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_locale_numpunct skin-cppreference2 action-view cpp-navbar">
<div id="cpp-content-base">
<div id="content"><a id="top"></a>
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>numpunct</h1>
<div id="bodyContent">
<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-locale.html">locale</a></span></div>
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
<table class="t-dcl-begin">
<tbody>
<tr class="t-dsc-header">
<td>
<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-locale.html">&lt;locale&gt;</a></code></div>
</td>
<td></td>
<td></td>
</tr>
<tr class="t-dcl">
<td class="t-dcl-nopad">
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> CharT <span class="sy1">&gt;</span><br />
<span class="kw1">class</span> numpunct<span class="sy4">;</span></span></div>
</td>
<td class="t-dcl-nopad"></td>
<td class="t-dcl-nopad"></td>
</tr>
<tr class="t-dcl-sep">
<td></td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<p>&#24179;&#38754; <code>std::numpunct</code> &#23553;&#35013;&#25968;&#20540;&#26631;&#28857;&#20559;&#22909;&#12290;&#27969; I/O &#25805;&#20316;&#36890;&#36807; <span class="t-lc"><a href="cpp-locale-num_get.html">std::num_get</a></span> &#21644; <span class="t-lc"><a href="cpp-locale-num_put.html">std::num_put</a></span> &#65292;&#23558;&#29992; <code>std::numpunct</code> &#29992;&#20110;&#21078;&#26512;&#25968;&#20540;&#36755;&#20837;&#65292;&#21644;&#26684;&#24335;&#21270;&#25968;&#20540;&#36755;&#20986;&#12290;</p>
<p><code>std::numpunct</code> &#25152;&#25903;&#25345;&#30340;&#25968;&#23383;&#25317;&#26377;&#21518;&#36848;&#26684;&#24335;&#12290;&#27492;&#22788; <code>digit</code> &#34920;&#31034; <code>fmtflags</code> &#21442;&#25968;&#20540;&#25152;&#25351;&#23450;&#30340;&#22522;&#24213;&#38598;&#65292; <code>thousands-sep</code> &#21644; <code>decimal-point</code> &#20998;&#21035;&#20026; <span class="t-lc"><a href="cpp-locale-numpunct-thousands_sep.html">thousands_sep()</a></span> &#21644; <span class="t-lc"><a href="cpp-locale-numpunct-decimal_point.html">decimal_point()</a></span> &#20989;&#25968;&#30340;&#32467;&#26524;&#12290;&#25972;&#25968;&#20540;&#26684;&#24335;&#22914;&#19979;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">integer ::= [sign] units
sign ::= plusminus
plusminus ::= &#39;+&#39; | &#39;-&#39;
units ::= digits [thousands-sep units]
digits ::= digit [digits]</pre></div>
</div>
<p><code>thousand-sep</code> &#20043;&#38388;&#30340;&#25968;&#20301;&#65288; <code>digits</code> &#30340;&#26368;&#22823;&#22823;&#23567;&#65289;&#30001; <span class="t-lc"><a href="cpp-locale-numpunct-grouping.html">grouping()</a></span> &#30340;&#32467;&#26524;&#25351;&#23450;&#12290;</p>
<p>&#28014;&#28857;&#20540;&#26684;&#24335;&#22914;&#19979;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">floatval ::= [sign] units [decimal-point [digits]] [e [sign] digits] |
[sign] decimal-point digits [e [sign] digits]
e ::= &#39;e&#39; | &#39;E&#39;</pre></div>
</div>
<div class="t-inheritance-diagram">
<div class="center">
<div class="noresize" style="height: 45px; width: 243px;"><map name="ImageMap_1_1518249413" id="ImageMap_1_1518249413">
<area href="cpp-locale-locale-facet.html" shape="rect" coords="5,6,107,39" alt="cpp/locale/locale/facet" /></map><img alt="std-numpunct-inheritance.svg" src="std-numpunct-inheritance.svg" width="243" height="45" usemap="#ImageMap_1_1518249413" /></div>
</div>
<div style="text-align:center;">
<p><span style="font-size:0.7em; line-height:130%">&#32487;&#25215;&#22270;</span></p>
</div>
</div>
<p>&#26631;&#20934;&#24211;&#25552;&#20379;&#20108;&#20010;&#23396;&#31435;&#65288;&#29420;&#31435;&#20110;&#26412;&#22320;&#29615;&#22659;&#65289;&#30340;&#29305;&#21270;&#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-locale.html">&lt;locale&gt;</a></code></div>
</td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">numpunct</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span></td>
<td>&#25552;&#20379; &quot;C&quot; &#26412;&#22320;&#29615;&#22659;&#20559;&#22909;&#30340;&#31561;&#20215;&#29256;&#26412;</td>
</tr>
<tr class="t-dsc">
<td><span class="t-c"><span class="mw-geshi cpp source-cpp">std<span class="sy4">::</span><span class="me2">numpunct</span><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span></td>
<td>&#25552;&#20379; &quot;C&quot; &#26412;&#22320;&#29615;&#22659;&#20559;&#22909;&#30340;&#23485;&#23383;&#31526;&#31561;&#20215;&#29256;&#26412;</td>
</tr>
</table>
<p>&#21478;&#22806;&#65292; C++ &#31243;&#24207;&#20013;&#26500;&#36896;&#30340;&#27599;&#20010; locale &#23545;&#35937;&#23454;&#29616;&#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>
<table class="t-dsc-begin">
<tr class="t-dsc-hitem">
<td>&#25104;&#21592;&#31867;&#22411;</td>
<td>&#23450;&#20041;</td>
</tr>
<tr class="t-dsc">
<td><code>char_type</code></td>
<td><code>charT</code></td>
</tr>
<tr class="t-dsc">
<td><code>string_type</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-string-basic_string.html"><span class="kw1228">std::<span class="me2">basic_string</span></span></a><span class="sy1">&lt;</span>charT<span class="sy1">&gt;</span></span></span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.87.BD.E6.95.B0">&#25104;&#21592;&#20989;&#25968;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-locale-numpunct-numpunct.html"><span class="t-lines"><span>(&#26500;&#36896;&#20989;&#25968;)</span></span></a></div>
</div>
</td>
<td>&#26500;&#36896;&#26032;&#30340; numpunct &#24179;&#38754;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div t-dsc-member-nobold-div">
<div><a href="cpp-locale-numpunct-~numpunct.html"><span class="t-lines"><span>(&#26512;&#26500;&#20989;&#25968;)</span></span></a></div>
</div>
</td>
<td>&#26512;&#26500; numpunct &#24179;&#38754;<br />
<span class="t-mark">(&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr>
<td colspan="2">
<h5><span class="mw-headline" id=""></span></h5>
</td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-decimal_point.html"><span class="t-lines"><span>decimal_point</span></span></a></div>
</div>
</td>
<td>&#35843;&#29992; <code>do_decimal_point</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-thousands_sep.html"><span class="t-lines"><span>thousands_sep</span></span></a></div>
</div>
</td>
<td>&#35843;&#29992; <code>do_thousands_sep</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-grouping.html"><span class="t-lines"><span>grouping</span></span></a></div>
</div>
</td>
<td>&#35843;&#29992; <code>do_grouping</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-truefalsename.html"><span class="t-lines"><span>truename</span><span>falsename</span></span></a></div>
</div>
</td>
<td>&#35843;&#29992; <code>do_truename</code> &#25110; <code>do_falsename</code><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
<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>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-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>
</div>
</td>
<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>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-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>
</div>
</td>
<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>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-grouping.html"><span class="t-lines"><span>do_grouping</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
</div>
</td>
<td>&#25552;&#20379;&#19968;&#23545;&#21315;&#20998;&#38548;&#31526;&#20043;&#38388;&#30340;&#20301;&#25968;<br />
<span class="t-mark">(&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct-truefalsename.html"><span class="t-lines"><span>do_truename</span><span>do_falsename</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
</div>
</td>
<td>&#25552;&#20379;&#29992;&#20316;&#24067;&#23572; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> &#21644; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> &#21517;&#31216;&#30340;&#23383;&#31526;&#20018;<br />
<span class="t-mark">(&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E6.88.90.E5.91.98.E5.AF.B9.E8.B1.A1">&#25104;&#21592;&#23545;&#35937;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><span class="t-lines"><span><span class="t-dsc-small">static std::locale::id</span> id</span></span></div>
</div>
</td>
<td>locale &#30340; <i>id</i><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#23545;&#35937;)</span></td>
</tr>
</table>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
<div class="t-example">
<p>&#19979;&#21015;&#20195;&#30721;&#26356;&#25913; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">true</span></span></span> &#21644; <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw2">false</span></span></span> &#30340;&#23383;&#31526;&#20018;&#34920;&#31034;</p>
<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="kw1">struct</span> french_bool <span class="sy4">:</span> std<span class="sy4">::</span><span class="me2">numpunct</span><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span> <span class="br0">{</span>
string_type do_truename<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;oui&quot;</span><span class="sy4">;</span> <span class="br0">}</span>
string_type do_falsename<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;non&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="sy1">&lt;&lt;</span> <span class="st0">&quot;default locale: &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-boolalpha.html"><span class="kw1764">std::<span class="me2">boolalpha</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="kw2">true</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> <span class="kw2">false</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 french_bool<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 numpunct: &quot;</span>
<span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-boolalpha.html"><span class="kw1764">std::<span class="me2">boolalpha</span></span></a> <span class="sy1">&lt;&lt;</span> <span class="kw2">true</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;, &quot;</span> <span class="sy1">&lt;&lt;</span> <span class="kw2">false</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>
</div>
<p>&#36755;&#20986;&#65306;</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;">
<div class="text source-text">
<pre class="de1">default locale: true, false
locale with modified numpunct: oui, non</pre></div>
</div>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
<table class="t-dsc-begin">
<tr class="t-dsc">
<td>
<div class="t-dsc-member-div">
<div><a href="cpp-locale-numpunct_byname.html"><span class="t-lines"><span>numpunct_byname</span></span></a></div>
</div>
</td>
<td>&#20026;&#20855;&#21517; locale &#21019;&#24314; numpunct &#24179;&#38754;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
</tr>
</table>
</div>
<div class="visualClear"></div>
</div>
</div>
</div>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink