68 lines
3.9 KiB
HTML
68 lines
3.9 KiB
HTML
<!DOCTYPE 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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<head><meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title>std::istrstream::~istrstream</title>
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<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_io_istrstream_istrstream skin-cppreference2 action-view cpp-navbar">
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::istrstream::</span>~istrstream</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-istrstream.html">istrstream</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">virtual</span> ~istrstream<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>销毁 <code>std::istrstream</code> 对象，这亦销毁成员 <span class="t-lc"><a href="cpp-io-strstreambuf.html">std::strstreambuf</a></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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<p>（无）</p>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">注意</span></h3>
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<p><span class="t-lc"><a href="cpp-io-istrstream.html">std::istrstream</a></span> 的构造函数不以动态分配模式创建底层 <span class="t-lc"><a href="cpp-io-strstreambuf.html">std::strstreambuf</a></span> ，故 <span class="t-lc"><a href="cpp-io-ostrstream-~ostrstream.html">std::ostrstream::~ostrstream</a></span> 或 <span class="t-lc"><a href="cpp-io-strstream-~strstream.html">std::strstream::~strstream</a></span> 可能有的内存泄露不会应用。</p>
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<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">示例</span></h3>
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<div dir="ltr" class="mw-geshi" style="text-align: left;">
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<div class="cpp source-cpp">
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<pre class="de1"><span class="co2">#include <strstream></span>
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<span class="co2">#include <iostream></span>
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<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
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<span class="br0">{</span>
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<span class="br0">{</span>
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<a href="cpp-io-istrstream.html"><span class="kw1753">std::<span class="me2">istrstream</span></span></a> s<span class="br0">(</span><span class="st0">"1.234"</span><span class="br0">)</span><span class="sy4">;</span>
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<span class="kw4">double</span> d<span class="sy4">;</span>
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s <span class="sy1">>></span> d<span class="sy4">;</span>
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<a href="cpp-io-cout.html"><span class="kw1758">std::<span class="me2">cout</span></span></a> <span class="sy1"><<</span> d <span class="sy1"><<</span> <span class="st0">'<span class="es1">\n</span>'</span><span class="sy4">;</span>
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<span class="br0">}</span> <span class="co1">// 调用析构函数</span>
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<span class="br0">}</span></pre></div>
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<p>输出：</p>
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<div class="text source-text">
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<pre class="de1">1.234</pre></div>
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