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hustoj/web/cppreference-zh/chmhelp/cpp-io-basic_ios-setstate.html
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<title>std::basic_ios&lt;CharT,Traits&gt;::setstate</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_ios&lt;CharT,Traits&gt;::</span>setstate</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-basic_ios.html">basic ios</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> setstate<span class="br0">(</span> iostate state <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>&#22312;&#24403;&#21069;&#24050;&#35774;&#32622;&#34920;&#20043;&#22806;&#65292;&#35774;&#32622;&#27969;&#38169;&#35823;&#29366;&#24577;&#26631;&#24535; <code>state</code> &#12290;&#23454;&#36136;&#19978;&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp">clear<span class="br0">(</span>rdstate<span class="br0">(</span><span class="br0">)</span> <span class="sy3">|</span> state<span class="br0">)</span></span></span> &#12290;&#21487;&#33021;&#25243;&#20986;&#24322;&#24120;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>state</td>
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<td>&#35201;&#35774;&#32622;&#30340;&#27969;&#38169;&#35823;&#29366;&#24577;&#26631;&#24535;&#12290;&#33021;&#20026;&#19979;&#21015;&#24120;&#37327;&#30340;&#32452;&#21512;&#65306;
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
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<td><a href="cpp-io-ios_base-iostate.html"><tt>goodbit</tt></a></td>
<td>&#26080;&#38169;&#35823;</td>
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<td><a href="cpp-io-ios_base-iostate.html"><tt>badbit</tt></a></td>
<td>&#19981;&#21487;&#24674;&#22797;&#30340;&#27969;&#38169;&#35823;</td>
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<td><a href="cpp-io-ios_base-iostate.html"><tt>failbit</tt></a></td>
<td>&#36755;&#20837;/&#36755;&#20986;&#25805;&#20316;&#22833;&#36133;&#65288;&#26684;&#24335;&#21270;&#25110;&#25552;&#21462;&#38169;&#35823;&#65289;</td>
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<td><a href="cpp-io-ios_base-iostate.html"><tt>eofbit</tt></a></td>
<td>&#20851;&#32852;&#30340;&#36755;&#20986;&#24207;&#21015;&#24050;&#25269;&#36798;&#25991;&#20214;&#23614;</td>
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<p><br /></p>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#65288;&#26080;&#65289;</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;iostream&gt;</span>
<span class="co2">#include &lt;sstream&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="cpp-io-basic_ostringstream.html"><span class="kw1736">std::<span class="me2">ostringstream</span></span></a> stream<span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span><span class="sy3">!</span>stream.<span class="me1">fail</span><span class="br0">(</span><span class="br0">)</span><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;stream is not fail<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
stream.<span class="me1">setstate</span><span class="br0">(</span><a href="cpp-io-ios_base-iostate.html"><span class="kw1700">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">failbit</span></span></a><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>stream.<span class="me1">fail</span><span class="br0">(</span><span class="br0">)</span><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;now stream is fail<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="kw1">if</span> <span class="br0">(</span><span class="sy3">!</span>stream.<span class="me1">good</span><span class="br0">(</span><span class="br0">)</span><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;and stream is not good<span class="es1">\n</span>&quot;</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="br0">}</span></pre></div>
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<p>&#36755;&#20986;&#65306;</p>
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<pre class="de1">stream is not fail
now stream is fail
and stream is not good</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-basic_ios-rdstate.html"><span class="t-lines"><span>rdstate</span></span></a></div>
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<td>&#36820;&#22238;&#29366;&#24577;&#26631;&#24535;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div><a href="cpp-io-basic_ios-clear.html"><span class="t-lines"><span>clear</span></span></a></div>
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<td>&#20462;&#25913;&#29366;&#24577;&#26631;&#24535;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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