82 lines
4.3 KiB
HTML
82 lines
4.3 KiB
HTML
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<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
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<title>std::basic_ios<CharT,Traits>::widen</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_io_basic_ios_widen skin-cppreference2 action-view cpp-navbar">
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<div id="cpp-content-base">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_ios<CharT,Traits>::</span>widen</h1>
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<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-io.html">io</a>‎ | <a href="cpp-io-basic_ios.html">basic ios</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">char_type widen<span class="br0">(</span> <span class="kw4">char</span> c <span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<p>转换字符 <code>c</code> 到其在当前本地环境的等价物。若需要，则将结果从 <span class="t-c"><span class="mw-geshi cpp source-cpp"><span class="kw4">char</span></span></span> 转换为用于流内的字符类型。</p>
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<p>等效地调用 <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-locale-use_facet.html"><span class="kw1897">std::<span class="me2">use_facet</span></span></a><span class="sy1"><</span> <a href="cpp-locale-ctype.html"><span class="kw1938">std::<span class="me2">ctype</span></span></a><span class="sy1"><</span>char_type<span class="sy1">></span> <span class="sy1">></span><span class="br0">(</span>getloc<span class="br0">(</span><span class="br0">)</span><span class="br0">)</span>.<span class="me1">widen</span><span class="br0">(</span>c<span class="br0">)</span></span></span> 。</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
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<td>c</td>
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<td>-</td>
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<td>要转换的字符</td>
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</tr>
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</table>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">返回值</span></h3>
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<p>转换为 <code>char_type</code> 的字符</p>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
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<div><a href="cpp-io-basic_ios-narrow.html"><span class="t-lines"><span>narrow</span></span></a></div>
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</td>
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<td>窄化字符<br />
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<span class="t-mark">(公开成员函数)</span></td>
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<tr class="t-dsc">
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<td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-locale-ctype-widen.html"><span class="t-lines"><span>do_widen</span></span></a></div>
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<div><span class="t-lines"><span><span class="t-cmark">[虚]</span></span></span></div>
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</div>
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</td>
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<td>将一或多个字符从 <code>char</code> 转换为 <code>charT</code><br />
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<span class="t-mark">(<code>std::ctype<CharT></code> 的虚受保护成员函数)</span></td>
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<div class="t-dsc-member-div">
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<div><a href="cpp-string-multibyte-btowc.html"><span class="t-lines"><span>btowc</span></span></a></div>
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</div>
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</td>
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<td>若可能，则加宽单字节窄字符为宽字符<br />
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<span class="t-mark">(函数)</span></td>
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