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hustoj/web/cppreference-zh/chmhelp/c-io-putchar.html
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<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-io.html">io</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;stdio.h&gt;</code></div>
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<div><span class="mw-geshi c source-c"><span class="kw4">int</span> putchar<span class="br0">(</span> <span class="kw4">int</span> ch <span class="br0">)</span><span class="sy4">;</span></span></div>
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<p>&#20889;&#23383;&#31526; <code>ch</code> &#21040; <code>stdout</code> &#12290;&#22312;&#20869;&#37096;&#65292;&#23383;&#31526;&#20110;&#20889;&#20837;&#21069;&#34987;&#36716;&#25442;&#21040; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">unsigned</span> <span class="kw4">char</span></span></span> &#12290;</p>
<p>&#31561;&#20215;&#20110; <span class="t-c"><span class="mw-geshi c source-c"><a href="c-io-fputc.html"><span class="kw831">putc</span></a><span class="br0">(</span>ch, <a href="c-io.html"><span class="kw886">stdout</span></a><span class="br0">)</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>ch</td>
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<td>&#35201;&#34987;&#20889;&#20837;&#30340;&#23383;&#31526;</td>
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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>&#25104;&#21151;&#26102;&#36820;&#22238;&#20889;&#20837;&#30340;&#23383;&#31526;&#12290;</p>
<p>&#22833;&#36133;&#26102;&#36820;&#22238; <span class="t-lc"><a href="c-io.html">EOF</a></span> &#24182;&#35774;&#32622; <span class="t-lc"><a href="c-io.html">stdout</a></span> &#19978;&#30340;<i>&#38169;&#35823;</i>&#25351;&#31034;&#22120;&#65288;&#35265; <span class="t-lc"><a href="c-io-ferror.html">ferror()</a></span> &#65289;&#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<p>putchar&#24102;&#38169;&#35823;&#26816;&#26597;</p>
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<pre class="de1"><span class="co2">#include &lt;stdio.h&gt;</span>
<span class="co2">#include &lt;stdlib.h&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">int</span> ret_code <span class="sy1">=</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="kw1">for</span> <span class="br0">(</span><span class="kw4">char</span> c <span class="sy1">=</span> <span class="st0">&#39;a&#39;</span><span class="sy4">;</span> <span class="br0">(</span>ret_code <span class="sy3">!</span><span class="sy1">=</span> <a href="c-io.html"><span class="kw888">EOF</span></a><span class="br0">)</span> <span class="sy3">&amp;&amp;</span> <span class="br0">(</span>c <span class="sy3">!</span><span class="sy1">=</span> <span class="st0">&#39;z&#39;</span><span class="br0">)</span><span class="sy4">;</span> c<span class="sy2">++</span><span class="br0">)</span>
ret_code <span class="sy1">=</span> putchar<span class="br0">(</span>c<span class="br0">)</span><span class="sy4">;</span>
<span class="coMULTI">/* &#27979;&#35797;&#26159;&#21542;&#25269;&#36798; EOF &#12290; */</span>
<span class="kw1">if</span> <span class="br0">(</span>ret_code <span class="sy1">==</span> <a href="c-io.html"><span class="kw888">EOF</span></a><span class="br0">)</span>
<span class="kw1">if</span> <span class="br0">(</span><a href="c-io-ferror.html"><span class="kw877">ferror</span></a><span class="br0">(</span><a href="c-io.html"><span class="kw886">stdout</span></a><span class="br0">)</span><span class="br0">)</span>
<span class="br0">{</span>
<a href="c-io-fprintf.html"><span class="kw851">fprintf</span></a><span class="br0">(</span><a href="c-io.html"><span class="kw887">stderr</span></a>,<span class="st0">&quot;putchar() failed in file %s at line # %d<span class="es1">\n</span>&quot;</span>, __FILE__,__LINE__<span class="sy2">-</span><span class="nu0">6</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-perror.html"><span class="kw878">perror</span></a><span class="br0">(</span><span class="st0">&quot;putchar()&quot;</span><span class="br0">)</span><span class="sy4">;</span>
<a href="c-program-exit.html"><span class="kw488">exit</span></a><span class="br0">(</span><a href="c-program-EXIT_status.html"><span class="kw494">EXIT_FAILURE</span></a><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span>
putchar<span class="br0">(</span><span class="st0">&#39;<span class="es1">\n</span>&#39;</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// putchar &#36820;&#22238;&#20540;&#19981;&#31561;&#20110;&#21442;&#25968;</span>
<span class="kw4">int</span> r <span class="sy1">=</span> <span class="nu12">0x1070</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;<span class="es1">\n</span>0x%x<span class="es1">\n</span>&quot;</span>, r<span class="br0">)</span><span class="sy4">;</span>
r <span class="sy1">=</span> putchar<span class="br0">(</span>r<span class="br0">)</span><span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw850">printf</span></a><span class="br0">(</span><span class="st0">&quot;<span class="es1">\n</span>0x%x<span class="es1">\n</span>&quot;</span>, r<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">abcdefghijklmnopqrstuvwxy
0x1070
p
0x70</pre></div>
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<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">&#24341;&#29992;</span></h3>
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<li>C11 &#26631;&#20934;&#65288;ISO/IEC 9899:2011&#65289;&#65306;</li>
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<li>7.21.7.8 The putchar function (p: 333)</li>
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<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
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<li>7.19.7.9 The putchar function (p: 299)</li>
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<li>C89/C90 &#26631;&#20934;&#65288;ISO/IEC 9899:1990&#65289;&#65306;</li>
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<li>4.9.7.9 The putchar function</li>
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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="c-io-fputc.html"><span class="t-lines"><span>fputc</span><span>putc</span></span></a></div>
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<td>&#23558;&#19968;&#20010;&#23383;&#31526;&#20889;&#20837;&#25991;&#20214;&#27969;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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