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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::strstreambuf::</span>~strstreambuf</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-io.html">io</a>&lrm; | <a href="cpp-io-strstreambuf.html">strstreambuf</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">virtual</span> ~strstreambuf<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>&#38144;&#27585; <code>std::strstreambuf</code> &#23545;&#35937;&#12290;&#33509;&#23545;&#35937;&#31649;&#29702;&#21160;&#24577;&#20998;&#37197;&#30340;&#32531;&#20914;&#21306;&#65288;&#32531;&#20914;&#29366;&#24577;&#20026;&ldquo;&#24050;&#20998;&#37197;&rdquo;&#65289;&#65292;&#19988;&#33509;&#23545;&#35937;&#38750;&#20923;&#32467;&#65292;&#21017;&#29992;&#26500;&#36896;&#26102;&#25552;&#20379;&#30340;&#35299;&#20998;&#37197;&#20989;&#25968;&#65292;&#25110;&#33509;&#26410;&#25552;&#20379;&#21017;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp">delete<span class="br0">[</span><span class="br0">]</span></span></span> &#35299;&#20998;&#37197;&#32531;&#20914;&#21306;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#27492;&#26512;&#26500;&#20989;&#25968;&#20856;&#22411;&#22320;&#20026; <span class="t-lc"><a href="cpp-io-strstream.html">std::strstream</a></span> &#30340;&#26512;&#26500;&#20989;&#25968;&#25152;&#35843;&#29992;&#12290;</p>
<p>&#33509;&#22312;&#21160;&#24577; strstream &#19978;&#35843;&#29992; <span class="t-lc"><a href="cpp-io-strstreambuf-str.html">str()</a></span> &#65292;&#32780;&#26410;&#22312;&#20043;&#21518;&#35843;&#29992; <span class="t-lc"><a href="cpp-io-strstreambuf-freeze.html">freeze(false)</a></span> &#65292;&#21017;&#27492;&#26512;&#26500;&#20989;&#25968;&#27844;&#38706;&#20869;&#23384;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<pre class="de1"><span class="co2">#include &lt;strstream&gt;</span>
<span class="co2">#include &lt;iostream&gt;</span>
<span class="kw4">void</span><span class="sy2">*</span> my_alloc<span class="br0">(</span>size_t n<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;my_alloc(&quot;</span> <span class="sy1">&lt;&lt;</span> n <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;) called<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="kw1">return</span> new <span class="kw4">char</span><span class="br0">[</span>n<span class="br0">]</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">void</span> my_free<span class="br0">(</span><span class="kw4">void</span><span class="sy2">*</span> p<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;my_free() called<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
delete<span class="br0">[</span><span class="br0">]</span> <span class="br0">(</span><span class="kw4">char</span><span class="sy2">*</span><span class="br0">)</span>p<span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="br0">{</span>
<a href="cpp-io-strstreambuf.html"><span class="kw1752">std::<span class="me2">strstreambuf</span></span></a> buf<span class="br0">(</span>my_alloc, my_free<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-basic_ostream.html"><span class="kw1729">std::<span class="me2">ostream</span></span></a> s<span class="br0">(</span><span class="sy3">&amp;</span>buf<span class="br0">)</span><span class="sy4">;</span>
s <span class="sy1">&lt;&lt;</span> <span class="nu16">1.23</span> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-ends.html"><span class="kw1789">std::<span class="me2">ends</span></span></a><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> buf.<span class="me1">str</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
buf.<span class="me1">freeze</span><span class="br0">(</span><span class="kw2">false</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span> <span class="co1">// &#26512;&#26500;&#20989;&#25968;&#35843;&#29992;&#20110;&#27492;&#65292;&#35299;&#20998;&#37197;&#32531;&#20914;&#21306;</span>
<span class="br0">{</span>
<a href="cpp-io-strstreambuf.html"><span class="kw1752">std::<span class="me2">strstreambuf</span></span></a> buf<span class="br0">(</span>my_alloc, my_free<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-basic_ostream.html"><span class="kw1729">std::<span class="me2">ostream</span></span></a> s<span class="br0">(</span><span class="sy3">&amp;</span>buf<span class="br0">)</span><span class="sy4">;</span>
s <span class="sy1">&lt;&lt;</span> <span class="nu16">1.23</span> <span class="sy1">&lt;&lt;</span> <a href="cpp-io-manip-ends.html"><span class="kw1789">std::<span class="me2">ends</span></span></a><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> buf.<span class="me1">str</span><span class="br0">(</span><span class="br0">)</span> <span class="sy1">&lt;&lt;</span> <span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="sy4">;</span>
<span class="co1">// buf.freeze(false);</span>
<span class="br0">}</span> <span class="co1">// &#26512;&#26500;&#20989;&#25968;&#35843;&#29992;&#20110;&#27492;&#65292;&#20869;&#23384;&#27844;&#28431;&#65281;</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">my_alloc(4096) called
1.23
my_free() called
my_alloc(4096) called
1.23</pre></div>
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