285 lines
15 KiB
HTML
285 lines
15 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="zh" dir="ltr" class="client-nojs" xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh">
|
|
<head><meta http-equiv="x-ua-compatible" content="ie=edge">
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<title>std::complex<T>::complex</title>
|
|
<link rel="stylesheet" href="ext.css" />
|
|
<link rel="stylesheet" href="site_modules.css" />
|
|
</head>
|
|
<body class="mediawiki ltr sitedir-ltr ns-0 ns-subject page-cpp_numeric_complex_complex skin-cppreference2 action-view cpp-navbar">
|
|
<div id="cpp-content-base">
|
|
<div id="content"><a id="top"></a>
|
|
<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::complex<T>::</span>complex</h1>
|
|
<div id="bodyContent">
|
|
<div id="contentSub"><span class="subpages">< <a href="cpp.html">cpp</a>‎ | <a href="cpp-numeric.html">numeric</a>‎ | <a href="cpp-numeric-complex.html">complex</a></span></div>
|
|
<div id="mw-content-text" lang="zh" dir="ltr" class="mw-content-ltr" xml:lang="zh">
|
|
<table class="t-dcl-begin">
|
|
<tbody>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl-h">
|
|
<td>
|
|
<div>初等模板 complex<T></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx14">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span> <span class="kw4">const</span> T<span class="sy3">&</span> re <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span>, <span class="kw4">const</span> T<span class="sy3">&</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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-until-cxx14">(C++14 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx14">
|
|
<td>
|
|
<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">&</span> re <span class="sy1">=</span> T<span class="br0">(</span><span class="br0">)</span>, <span class="kw4">const</span> T<span class="sy3">&</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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-cxx14">(C++14 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody></tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx14">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy3">&</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(2)</td>
|
|
<td><span class="t-mark-rev t-until-cxx14">(C++14 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx14">
|
|
<td>
|
|
<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">&</span> other <span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(2)</td>
|
|
<td><span class="t-mark-rev t-since-cxx14">(C++14 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody></tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx14">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> X <span class="sy1">></span><br />
|
|
complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy1"><</span>X<span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-until-cxx14">(C++14 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx14">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp"><span class="kw1">template</span><span class="sy1"><</span> <span class="kw1">class</span> X <span class="sy1">></span><br />
|
|
<span class="kw4">constexpr</span> complex<span class="br0">(</span> <span class="kw4">const</span> complex<span class="sy1"><</span>X<span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-since-cxx14">(C++14 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl-h">
|
|
<td>
|
|
<div>特化 complex<float></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody></tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<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"><</span><span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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"><</span><span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl-h">
|
|
<td>
|
|
<div>特化 complex<double></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody></tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1"><</span><span class="kw4">float</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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"><</span><span class="kw4">float</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">long</span> <span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
<tr class="t-dcl-h">
|
|
<td>
|
|
<div>特化 complex<long double></div>
|
|
</td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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>
|
|
</td>
|
|
<td>(1)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
</tbody>
|
|
<tbody></tbody>
|
|
<tbody class="t-dcl-rev">
|
|
<tr class="t-dcl t-until-cxx11">
|
|
<td>
|
|
<div><span class="mw-geshi cpp source-cpp">complex<span class="br0">(</span><span class="kw4">const</span> complex<span class="sy1"><</span><span class="kw4">float</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-until-cxx11">(C++11 前)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl t-since-cxx11">
|
|
<td>
|
|
<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"><</span><span class="kw4">float</span><span class="sy1">></span><span class="sy3">&</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"><</span><span class="kw4">double</span><span class="sy1">></span><span class="sy3">&</span> other<span class="br0">)</span><span class="sy4">;</span></span></div>
|
|
</td>
|
|
<td>(3)</td>
|
|
<td><span class="t-mark-rev t-since-cxx11">(C++11 起)</span></td>
|
|
</tr>
|
|
<tr class="t-dcl-sep">
|
|
<td></td>
|
|
<td></td>
|
|
<td></td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<p>构造 <span class="t-lc"><a href="cpp-numeric-complex.html">std::complex</a></span> 对象。</p>
|
|
<div class="t-li1"><span class="t-li">1)</span> 从实部和虚部构造复数。</div>
|
|
<div class="t-li1"><span class="t-li">2)</span> 复制构造函数。以 <code>other</code> 内容的副本构造复数。复制构造函数在标准特化中为隐式。</div>
|
|
<div class="t-li1"><span class="t-li">3)</span> <a href="cpp-language-converting_constructor.html">转化构造函数</a>。从不同类型的复数构造对象。</div>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">参数</span></h3>
|
|
<table class="t-par-begin">
|
|
<tr class="t-par">
|
|
<td>re</td>
|
|
<td>-</td>
|
|
<td>实部</td>
|
|
</tr>
|
|
<tr class="t-par">
|
|
<td>im</td>
|
|
<td>-</td>
|
|
<td>虚部</td>
|
|
</tr>
|
|
<tr class="t-par">
|
|
<td>other</td>
|
|
<td>-</td>
|
|
<td>用作源的另一复数</td>
|
|
</tr>
|
|
</table>
|
|
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
|
|
<table class="t-dsc-begin">
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-numeric-complex-operator=.html"><span class="t-lines"><span>operator=</span></span></a></div>
|
|
</div>
|
|
</td>
|
|
<td>赋值内容<br />
|
|
<span class="t-mark">(公开成员函数)</span></td>
|
|
</tr>
|
|
<tr class="t-dsc">
|
|
<td>
|
|
<div class="t-dsc-member-div">
|
|
<div><a href="cpp-numeric-complex-operator_22_22i.html"><span class="t-lines"><span>operator""if</span><span>operator""i</span><span>operator""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>
|
|
</div>
|
|
</td>
|
|
<td>表示纯虚数的 <span class="t-lc"><a href="cpp-numeric-complex.html">std::complex</a></span> 字面量<br />
|
|
<span class="t-mark">(函数)</span></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<div class="visualClear"></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|