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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::complex&lt;T&gt;::</span>complex</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-numeric.html">numeric</a>&lrm; | <a href="cpp-numeric-complex.html">complex</a></span></div>
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<div>&#21021;&#31561;&#27169;&#26495; complex&lt;T&gt;</div>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span> <span class="kw4">const</span> T<span class="sy3">&amp;</span> re <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span>, <span class="kw4">const</span> T<span class="sy3">&amp;</span> im <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-until-cxx14">(C++14 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span> <span class="kw4">const</span> T<span class="sy3">&amp;</span> re <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span>, <span class="kw4">const</span> T<span class="sy3">&amp;</span> im <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span> <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-cxx14">(C++14 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy3">&amp;</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(2)</td>
<td><span class="t-mark-rev t-until-cxx14">(C++14 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy3">&amp;</span> other <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-cxx14">(C++14 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> X <span class="sy1">&gt;</span><br />
complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy1">&lt;</span>X<span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-until-cxx14">(C++14 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1">&lt;</span> <span class="kw1">class</span> X <span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy1">&lt;</span>X<span class="sy1">&gt;</span><span class="sy3">&amp;</span> &nbsp;other<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-cxx14">(C++14 &#36215;)</span></td>
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<div>&#29305;&#21270; complex&lt;float&gt;</div>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">float</span> re <span class="sy1">=</span> <span class="nu17">0.0f</span>, <span class="kw4">float</span> im <span class="sy1">=</span> <span class="nu17">0.0f</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">float</span> re <span class="sy1">=</span> <span class="nu17">0.0f</span>, <span class="kw4">float</span> im <span class="sy1">=</span> <span class="nu17">0.0f</span><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-cxx11">(C++11 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw1">explicit</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">explicit</span> <span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw1">explicit</span> <span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<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-cxx11">(C++11 &#36215;)</span></td>
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<div>&#29305;&#21270; complex&lt;double&gt;</div>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">double</span> re <span class="sy1">=</span> <span class="nu16">0.0</span>, <span class="kw4">double</span> im <span class="sy1">=</span> <span class="nu16">0.0</span><span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">double</span> re <span class="sy1">=</span> <span class="nu16">0.0</span>, <span class="kw4">double</span> im <span class="sy1">=</span> <span class="nu16">0.0</span><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-cxx11">(C++11 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">float</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw1">explicit</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">float</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw1">explicit</span> <span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<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-cxx11">(C++11 &#36215;)</span></td>
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<div>&#29305;&#21270; complex&lt;long double&gt;</div>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">double</span> re <span class="sy1">=</span> 0.0L, <span class="kw4">long</span> <span class="kw4">double</span> im <span class="sy1">=</span> 0.0L<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">long</span> <span class="kw4">double</span> re <span class="sy1">=</span> 0.0L, <span class="kw4">long</span> <span class="kw4">double</span> im <span class="sy1">=</span> 0.0L<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-cxx11">(C++11 &#36215;)</span></td>
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<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">float</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(3)</td>
<td><span class="t-mark-rev t-until-cxx11">(C++11 &#21069;)</span></td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">float</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<span class="br0">)</span><span class="sy4">;</span><br />
<span class="kw4">constexpr</span> complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1">&lt;</span><span class="kw4">double</span><span class="sy1">&gt;</span><span class="sy3">&amp;</span> other<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-cxx11">(C++11 &#36215;)</span></td>
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<p>&#26500;&#36896; <span class="t-lc"><a href="cpp-numeric-complex.html">std::complex</a></span> &#23545;&#35937;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#20174;&#23454;&#37096;&#21644;&#34394;&#37096;&#26500;&#36896;&#22797;&#25968;&#12290;</div>
<div class="t-li1"><span class="t-li">2)</span> &#22797;&#21046;&#26500;&#36896;&#20989;&#25968;&#12290;&#20197; <code>other</code> &#20869;&#23481;&#30340;&#21103;&#26412;&#26500;&#36896;&#22797;&#25968;&#12290;&#22797;&#21046;&#26500;&#36896;&#20989;&#25968;&#22312;&#26631;&#20934;&#29305;&#21270;&#20013;&#20026;&#38544;&#24335;&#12290;</div>
<div class="t-li1"><span class="t-li">3)</span> <a href="cpp-language-converting_constructor.html">&#36716;&#21270;&#26500;&#36896;&#20989;&#25968;</a>&#12290;&#20174;&#19981;&#21516;&#31867;&#22411;&#30340;&#22797;&#25968;&#26500;&#36896;&#23545;&#35937;&#12290;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>re</td>
<td>-</td>
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<td>im</td>
<td>-</td>
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<td>other</td>
<td>-</td>
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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-numeric-complex-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
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<td>&#36171;&#20540;&#20869;&#23481;<br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-numeric-complex-operator_22_22i.html"><span class="t-lines"><span>operator&quot;&quot;if</span><span>operator&quot;&quot;i</span><span>operator&quot;&quot;il</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx14">(C++14)</span></span></span></div>
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<td>&#34920;&#31034;&#32431;&#34394;&#25968;&#30340; <span class="t-lc"><a href="cpp-numeric-complex.html">std::complex</a></span> &#23383;&#38754;&#37327;<br />
<span class="t-mark">(&#20989;&#25968;)</span></td>
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