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<title>std::complex&lt;T&gt;::operator+(unary), operator-(unary)</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::complex&lt;T&gt;::</span>operator+<span class="t-dsc-small">(unary)</span>, operator-<span class="t-dsc-small">(unary)</span></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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<td rowspan="142">(1)</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> T <span class="sy1">&gt;</span><br />
<a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span> operator<span class="sy2">+</span><span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> val <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx20">(C++20 &#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> T <span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span> operator<span class="sy2">+</span><span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> val <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<td rowspan="142">(2)</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> T <span class="sy1">&gt;</span><br />
<a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> val <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-until-cxx20">(C++20 &#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> T <span class="sy1">&gt;</span><br />
<span class="kw4">constexpr</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span> operator<span class="sy2">-</span><span class="br0">(</span> <span class="kw4">const</span> <a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="sy3">&amp;</span> val <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx20">(C++20 &#36215;)</span></td>
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<p>&#20026;&#22797;&#25968;&#23454;&#29616;&#19968;&#20803;&#31639;&#26415;&#36816;&#31639;&#31526;&#30340;&#31867;&#20284;&#29289;&#12290;</p>
<div class="t-li1"><span class="t-li">1)</span> &#36820;&#22238;&#20854;&#21442;&#25968;&#30340;&#20540;</div>
<div class="t-li1"><span class="t-li">2)</span> &#27714;&#21442;&#25968;&#30340;&#30456;&#21453;&#25968;</div>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>val</td>
<td>-</td>
<td>&#22797;&#25968;&#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>
<div class="t-li1"><span class="t-li">1)</span> &#21442;&#25968;&#30340;&#21103;&#26412;&#65292; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="br0">(</span>val<span class="br0">)</span></span></span></div>
<div class="t-li1"><span class="t-li">2)</span> &#21442;&#25968;&#30340;&#30456;&#21453;&#25968;&#65292; <span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-numeric-complex.html"><span class="kw1472">std::<span class="me2">complex</span></span></a><span class="sy1">&lt;</span>T<span class="sy1">&gt;</span><span class="br0">(</span><span class="sy2">-</span>val.<span class="me1">real</span><span class="br0">(</span><span class="br0">)</span>, <span class="sy2">-</span>val.<span class="me1">imag</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span></span></span></div>
<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_arith3.html"><span class="t-lines"><span>operator+</span><span>operator-</span><span>operator*</span><span>operator/</span></span></a></div>
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<td>&#22312;&#20004;&#20010;&#22797;&#25968;&#65292;&#25110;&#19968;&#20010;&#22797;&#25968;&#19982;&#19968;&#20010;&#26631;&#37327;&#19978;&#36827;&#34892;&#22797;&#25968;&#31639;&#26415;&#36816;&#31639;<br />
<span class="t-mark">(&#20989;&#25968;&#27169;&#26495;)</span></td>
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