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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::strstreambuf::</span>str</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="kw4">char</span><span class="sy2">*</span> str<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span></span></div>
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<p>&#35843;&#29992; <span class="t-lc"><a href="cpp-io-strstreambuf-freeze.html">freeze()</a></span> &#65292;&#28982;&#21518;&#36820;&#22238;&#33719;&#21462;&#21306;&#30340;&#36215;&#22987;&#25351;&#38024;&#65292; <span class="t-lc"><a href="cpp-io-basic_streambuf-gptr.html">std::streambuf::eback()</a></span> &#12290;</p>
<p>&#23545;&#20110;&#25152;&#26377;&#36890;&#36807; <span class="t-lc"><a href="cpp-io-strstream.html">std::strstream</a></span> &#25552;&#20379;&#30340;&#25509;&#21475;&#26500;&#36896;&#30340;&#21487;&#20889; <code>std::strstreambuf</code> &#23545;&#35937;&#65292;&#33719;&#21462;&#21306;&#30340;&#36215;&#22987;&#20134;&#20026;&#25918;&#32622;&#21306;&#30340;&#36215;&#22987;&#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=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p><span class="t-lc"><a href="cpp-io-basic_streambuf-gptr.html">eback()</a></span> &#30340;&#21103;&#26412;&#65292;&#21487;&#33021;&#20026;&#31354;&#25351;&#38024;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#20856;&#22411;&#22320;&#36890;&#36807; <span class="t-lc"><a href="cpp-io-strstream.html">std::strstream</a></span> &#25509;&#21475;&#35843;&#29992;&#27492;&#20989;&#25968;&#12290;</p>
<p>&#23545; <span class="t-lc"><a href="cpp-io-strstreambuf-freeze.html">freeze()</a></span> &#30340;&#35843;&#29992;&#20445;&#35777;&#36820;&#22238;&#25351;&#38024;&#30452;&#33267;&#19979;&#27425;&#23545; <span class="t-lc">freeze(false)</span> &#30340;&#26174;&#24335;&#35843;&#29992;&#21069;&#20445;&#25345;&#21512;&#27861;&#65306;&#21542;&#21017;&#65288;&#22312;&#21160;&#24577;&#32531;&#20914;&#19978;&#65289;&#20219;&#20309;&#36755;&#20986;&#25805;&#20316;&#21487;&#33021;&#35302;&#21457;&#32531;&#20914;&#21306;&#37325;&#20998;&#37197;&#65292;&#32780;&#36825;&#20250;&#38750;&#27861;&#21270;&#25351;&#38024;&#12290;&#23427;&#20134;&#23548;&#33268; <code>std::strstreambuf</code> &#30340;&#26512;&#26500;&#20989;&#25968;&#20013;&#30340;&#20869;&#23384;&#27844;&#28431;&#65292;&#38500;&#38750;&#22312;&#38144;&#27585;&#32531;&#20914;&#65288;&#25110;&#26356;&#24120;&#29992;&#22320;&#20026;&#31649;&#29702;&#23427;&#30340; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-strstream.html"><span class="kw1755">std::<span class="me2">strstream</span></span></a></span></span> &#65289;&#21069;&#35843;&#29992; <span class="t-lc">freeze(false)</span> &#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">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-strstream.html"><span class="kw1755">std::<span class="me2">strstream</span></span></a> dyn<span class="sy4">;</span> <span class="co1">// &#21160;&#24577;&#20998;&#37197;&#30340;&#35835;/&#20889;&#32531;&#20914;&#21306;</span>
dyn <span class="sy1">&lt;&lt;</span> <span class="st0">&quot;Test: &quot;</span> <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-strstreambuf.html"><span class="kw1752">std::<span class="me2">strstreambuf</span></span></a><span class="sy2">*</span> buf <span class="sy1">=</span> dyn.<span class="me1">rdbuf</span><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;R/W buffer holds <span class="es1">\&quot;</span>&quot;</span> <span class="sy1">&lt;&lt;</span> buf<span class="sy2">-</span><span class="sy1">&gt;</span>str<span class="br0">(</span><span class="br0">)</span> <span class="co1">// &#25110; dyn.str()</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span><span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
dyn.<span class="me1">freeze</span><span class="br0">(</span><span class="kw2">false</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#22312;&#21160;&#24577; strstream &#19978;&#35843;&#29992; .str() &#21518;</span>
<span class="kw4">char</span> arr<span class="br0">[</span><span class="nu0">10</span><span class="br0">]</span><span class="sy4">;</span>
<a href="cpp-io-ostrstream.html"><span class="kw1754">std::<span class="me2">ostrstream</span></span></a> user<span class="br0">(</span>arr, <span class="nu0">10</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// fixed-size write-only buffer</span>
buf <span class="sy1">=</span> user.<span class="me1">rdbuf</span><span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
user <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> <span class="st0">&quot;Write-only buffer holds <span class="es1">\&quot;</span>&quot;</span> <span class="sy1">&lt;&lt;</span> buf<span class="sy2">-</span><span class="sy1">&gt;</span>str<span class="br0">(</span><span class="br0">)</span> <span class="co1">// &#25110; user.str()</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span><span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<a href="cpp-io-istrstream.html"><span class="kw1753">std::<span class="me2">istrstream</span></span></a> lit<span class="br0">(</span><span class="st0">&quot;1 2 3&quot;</span><span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#22266;&#23450;&#22823;&#23567;&#21482;&#35835;&#32531;&#20914;&#21306;</span>
buf <span class="sy1">=</span> lit.<span class="me1">rdbuf</span><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;Read-only buffer holds <span class="es1">\&quot;</span>&quot;</span> <span class="sy1">&lt;&lt;</span> buf<span class="sy2">-</span><span class="sy1">&gt;</span>str<span class="br0">(</span><span class="br0">)</span> <span class="co1">// &#25110; lit.str()</span>
<span class="sy1">&lt;&lt;</span> <span class="st0">&quot;<span class="es1">\&quot;</span><span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">R/W buffer holds &quot;Test: 1.23&quot;
Write-only buffer holds &quot;1.23&quot;
Read-only buffer holds &quot;1 2 31 2 3&quot;</pre></div>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-io-strstream-str.html"><span class="t-lines"><span>str</span></span></a></div>
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<td>&#35775;&#38382;&#36755;&#20986;&#32531;&#20914;&#21306;<br />
<span class="t-mark">(<code>std::strstream</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-io-ostrstream-str.html"><span class="t-lines"><span>str</span></span></a></div>
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<td>&#35775;&#38382;&#36755;&#20986;&#32531;&#20914;&#21306;<br />
<span class="t-mark">(<code>std::ostrstream</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-io-istrstream-str.html"><span class="t-lines"><span>str</span></span></a></div>
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<td>&#35775;&#38382;&#36755;&#20986;&#32531;&#20914;&#21306;<br />
<span class="t-mark">(<code>std::istrstream</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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