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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::</span>ferror</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-c.html">c</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code><a href="cpp-header-cstdio.html">&lt;cstdio&gt;</a></code></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">int</span> ferror<span class="br0">(</span> <a href="cpp-io-c.html"><span class="kw1876">std::<span class="me2">FILE</span></span></a><span class="sy2">*</span> stream <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>&#26816;&#26597;&#32473;&#23450;&#30340;&#27969;&#30340;&#38169;&#35823;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>stream</td>
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<td>&#35201;&#26816;&#26597;&#30340;&#25991;&#20214;&#27969;</td>
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<p>&#33509;&#25991;&#20214;&#27969;&#24050;&#20986;&#29616;&#38169;&#35823;&#21017;&#20026;&#38750;&#38646;&#20540;&#65292;&#21542;&#21017;&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp">&#8203;<span class="nu0">0</span>&#8203;</span></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;cstdio&gt;</span>
<span class="co2">#include &lt;cstdlib&gt;</span>
<span class="co2">#include &lt;clocale&gt;</span>
<span class="co2">#include &lt;cwchar&gt;</span>
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
<span class="kw4">const</span> <span class="kw4">char</span> <span class="sy2">*</span>fname <span class="sy1">=</span> <a href="cpp-io-c-tmpnam.html"><span class="kw1875">std::<span class="me2">tmpnam</span></span></a><span class="br0">(</span>nullptr<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-c.html"><span class="kw1876">std::<span class="me2">FILE</span></span></a><span class="sy2">*</span> f <span class="sy1">=</span> <a href="cpp-io-c-fopen.html"><span class="kw1813">std::<span class="me2">fopen</span></span></a><span class="br0">(</span>fname, <span class="st0">&quot;wb&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-io-c-fputs.html"><span class="kw1826">std::<span class="me2">fputs</span></span></a><span class="br0">(</span><span class="st0">&quot;<span class="es2">\xff</span><span class="es2">\xff</span><span class="es1">\n</span>&quot;</span>, f<span class="br0">)</span><span class="sy4">;</span> <span class="co1">// &#19981;&#26159;&#21512;&#27861;&#30340; UTF-8 &#23383;&#31526;&#24207;&#21015;</span>
<a href="cpp-io-c-fclose.html"><span class="kw1816">std::<span class="me2">fclose</span></span></a><span class="br0">(</span>f<span class="br0">)</span><span class="sy4">;</span>
<a href="cpp-locale-setlocale.html"><span class="kw1989">std::<span class="me2">setlocale</span></span></a><span class="br0">(</span><a href="cpp-locale-LC_categories.html"><span class="kw1992">LC_ALL</span></a>, <span class="st0">&quot;en_US.utf8&quot;</span><span class="br0">)</span><span class="sy4">;</span>
f <span class="sy1">=</span> <a href="cpp-io-c-fopen.html"><span class="kw1813">std::<span class="me2">fopen</span></span></a><span class="br0">(</span>fname, <span class="st0">&quot;rb&quot;</span><span class="br0">)</span><span class="sy4">;</span>
std<span class="sy4">::</span><span class="me2">wint_t</span> ch<span class="sy4">;</span>
<span class="kw1">while</span> <span class="br0">(</span><span class="br0">(</span>ch<span class="sy1">=</span><a href="cpp-io-c-fgetwc.html"><span class="kw1832">std::<span class="me2">fgetwc</span></span></a><span class="br0">(</span>f<span class="br0">)</span><span class="br0">)</span> <span class="sy3">!</span><span class="sy1">=</span> WEOF<span class="br0">)</span> <span class="co1">// &#35797;&#22270;&#20316;&#20026; UTF-8 &#35835;&#21462;</span>
<a href="cpp-io-c-fprintf.html"><span class="kw1845">std::<span class="me2">printf</span></span></a><span class="br0">(</span><span class="st0">&quot;%#x &quot;</span>, ch<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span><a href="cpp-io-c-feof.html"><span class="kw1871">std::<span class="me2">feof</span></span></a><span class="br0">(</span>f<span class="br0">)</span><span class="br0">)</span>
puts<span class="br0">(</span><span class="st0">&quot;EOF indicator set&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">if</span> <span class="br0">(</span>std<span class="sy4">::</span><span class="me2">ferror</span><span class="br0">(</span>f<span class="br0">)</span><span class="br0">)</span>
puts<span class="br0">(</span><span class="st0">&quot;Error indicator set&quot;</span><span class="br0">)</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">Error indicator set</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-c-clearerr.html"><span class="t-lines"><span>clearerr</span></span></a></div>
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<td>&#28165;&#38500;&#38169;&#35823;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-io-c-feof.html"><span class="t-lines"><span>feof</span></span></a></div>
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<td>&#26816;&#26597;&#25991;&#20214;&#23614;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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<div><a href="cpp-io-basic_ios-fail.html"><span class="t-lines"><span>fail</span></span></a></div>
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<td>&#26816;&#26597;&#26159;&#21542;&#21457;&#29983;&#20102;&#21487;&#24674;&#22797;&#30340;&#38169;&#35823;<br />
<span class="t-mark">(<code>std::basic_ios&lt;CharT,Traits&gt;</code> &#30340;&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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