67 lines
4.5 KiB
HTML
67 lines
4.5 KiB
HTML
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<title>std::basic_ostream<CharT,Traits>::~basic_ostream</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_ostream<CharT,Traits>::</span>~basic_ostream</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_ostream.html">basic ostream</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">virtual</span> ~basic_ostream<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>销毁 <code>basic_ostream</code> 对象。此析构函数不进行底层流缓冲（ <code>rdbuf()</code> ）上的任何操作：导出输出流，如 <span class="t-lc"><a href="cpp-io-basic_ofstream.html">std::basic_ofstream</a></span> 与 <span class="t-lc"><a href="cpp-io-basic_ostringstream.html">std::basic_ostringstream</a></span> 的析构函数负责调用流缓冲的析构函数。</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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<pre class="de1"><span class="co2">#include <sstream></span>
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<span class="co2">#include <iostream></span>
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<span class="kw4">void</span> add_words<span class="br0">(</span><a href="cpp-io-basic_streambuf.html"><span class="kw1724">std::<span class="me2">streambuf</span></span></a><span class="sy2">*</span> p<span class="br0">)</span>
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<span class="br0">{</span>
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<a href="cpp-io-basic_ostream.html"><span class="kw1729">std::<span class="me2">ostream</span></span></a> buf<span class="br0">(</span>p<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// buf 与 s 共享缓冲</span>
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buf <span class="sy1"><<</span> <span class="st0">" is the answer"</span><span class="sy4">;</span>
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<span class="br0">}</span> <span class="co1">// 调用 buf 的析构函数。 p 保持不受影响。</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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<a href="cpp-io-basic_ostringstream.html"><span class="kw1736">std::<span class="me2">ostringstream</span></span></a> s<span class="sy4">;</span>
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s <span class="sy1"><<</span> <span class="nu0">42</span><span class="sy4">;</span>
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add_words<span class="br0">(</span>s.<span class="me1">rdbuf</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
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s <span class="sy1"><<</span> <span class="st0">"."</span><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> s.<span class="me1">str</span><span class="br0">(</span><span class="br0">)</span> <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></pre></div>
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<p>输出：</p>
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<pre class="de1">42 is the answer.</pre></div>
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