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hustoj/web/cppreference-zh/chmhelp/c-numeric-complex-cimag.html
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<h1 id="firstHeading" class="firstHeading">cimagf, cimag, cimagl</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="c.html">c</a>&lrm; | <a href="c-numeric.html">numeric</a>&lrm; | <a href="c-numeric-complex.html">complex</a></span></div>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;complex.h&gt;</code></div>
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<div><span class="mw-geshi c source-c"><span class="kw4">float</span> &nbsp; &nbsp; &nbsp; cimagf<span class="br0">(</span> <span class="kw4">float</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a> z <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<div><span class="mw-geshi c source-c"><span class="kw4">double</span> &nbsp; &nbsp; &nbsp;cimag<span class="br0">(</span> <span class="kw4">double</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a> z <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<div><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span> cimagl<span class="br0">(</span> <span class="kw4">long</span> <span class="kw4">double</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a> z <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<div>&#23450;&#20041;&#20110;&#22836;&#25991;&#20214; <code>&lt;tgmath.h&gt;</code></div>
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<div><span class="mw-geshi c source-c"><span class="co2">#define cimag( z )</span></span></div>
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<td>(4)</td>
<td><span class="t-mark-rev t-since-c99">(C99 &#36215;)</span></td>
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<div class="t-li1"><span class="t-li">1-3)</span> &#36820;&#22238; <code>z</code> &#30340;&#34394;&#37096;&#12290;</div>
<div class="t-li1"><span class="t-li">4)</span> &#27867;&#22411;&#23439;&#65306;&#33509; <code>z</code> &#25317;&#26377; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a></span></span> &#12289; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span> <a href="c-numeric-complex-imaginary.html"><span class="kw745">imaginary</span></a></span></span> &#25110; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">long</span> <span class="kw4">double</span></span></span> &#31867;&#22411;&#65292;&#21017;&#35843;&#29992; <code>cimagl</code> &#12290;&#33509; <code>z</code> &#25317;&#26377; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a></span></span> &#12289; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span> <a href="c-numeric-complex-imaginary.html"><span class="kw745">imaginary</span></a></span></span> &#25110; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">float</span></span></span> &#31867;&#22411;&#65292;&#21017;&#35843;&#29992; <code>cimagf</code> &#12290;&#33509; <code>z</code> &#25317;&#26377; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a></span></span> &#12289; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span> <a href="c-numeric-complex-imaginary.html"><span class="kw745">imaginary</span></a></span></span> &#12289; <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">double</span></span></span> &#25110;&#20219;&#20309;&#25972;&#25968;&#31867;&#22411;&#65292;&#21017;&#35843;&#29992; <code>cimag</code> &#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>z</td>
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<td>&#22797;&#21442;&#25968;</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><code>z</code> &#30340;&#34394;&#37096;&#12290;</p>
<p>&#27492;&#20989;&#25968;&#23545;&#25152;&#26377;&#21487;&#34892;&#36755;&#20837;&#23436;&#20840;&#25351;&#26126;&#65292;&#32780;&#19988;&#19981;&#21463;&#21046;&#20110;&#20219;&#20309;&#25551;&#36848;&#20110; <a href="c-numeric-math-math_errhandling.html">math_errhandling</a> &#30340;&#38169;&#35823;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#23545;&#20110;&#20219;&#20309;&#22797;&#25968;&#21464;&#37327; <code>z</code> &#65292; <span class="t-c"><span class="mw-geshi c source-c">z <span class="sy1">==</span> <a href="c-numeric-complex-creal.html"><span class="kw751">creal</span></a><span class="br0">(</span>z<span class="br0">)</span> <span class="sy2">+</span> I<span class="sy2">*</span>cimag<span class="br0">(</span>z<span class="br0">)</span></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;stdio.h&gt;</span>
<span class="co2">#include &lt;complex.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">double</span> <a href="c-numeric-complex-complex.html"><span class="kw743">complex</span></a> z <span class="sy1">=</span> <span class="nu16">1.0</span> <span class="sy2">+</span> <span class="nu16">2.0</span><span class="sy2">*</span>I<span class="sy4">;</span>
<a href="c-io-fprintf.html"><span class="kw848">printf</span></a><span class="br0">(</span><span class="st0">&quot;%f%+fi<span class="es1">\n</span>&quot;</span>, <a href="c-numeric-complex-creal.html"><span class="kw751">creal</span></a><span class="br0">(</span>z<span class="br0">)</span>, cimag<span class="br0">(</span>z<span class="br0">)</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">1.000000+2.000000i</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>7.3.9.2 The cimag functions (p: 197)</li>
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<li>7.25 Type-generic math &lt;tgmath.h&gt; (p: 373-375)</li>
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<li>G.7 Type-generic math &lt;tgmath.h&gt; (p: 545)</li>
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<li>C99 &#26631;&#20934;&#65288;ISO/IEC 9899:1999&#65289;&#65306;</li>
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<li>7.3.9.2 The cimag functions (p: 178-179)</li>
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<li>7.22 Type-generic math &lt;tgmath.h&gt; (p: 335-337)</li>
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<li>G.7 Type-generic math &lt;tgmath.h&gt; (p: 480)</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-numeric-complex-creal.html"><span class="t-lines"><span>creal</span><span>crealf</span><span>creall</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
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<td>&#35745;&#31639;&#22797;&#25968;&#30340;&#23454;&#37096;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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