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C++ Complex Numbers [C++ Reference]
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<h1><a name="c_complex_numbers" id="c_complex_numbers">C++ Complex Numbers</a></h1>
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<p>
The <code>complex</code> class provides a useful way to deal with complex numbers. It is defined as a basic template class in the <code>std</code> namespace in the <code><complex></code> header file.
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<pre class="c code c++" style="font-family:monospace;"> template<span class="sy0"><</span>typename Num<span class="sy0">></span>
<span class="kw4">struct</span> complex<span class="sy0">;</span></pre>
<p>
The type parameter <code>Num</code> is the type that is used for each of the real and imaginary components of the complex number. It must be one of: <code>float</code>, <code>double</code>, or <code>long double</code>.
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<td class="col0"><a href="../complex/complex.html" class="wikilink1" title="complex:complex_constructors">Constructors</a></td><td class="col1">create complex numbers from the real and imaginary parts or other complex numbers</td>
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<td class="col0"><a href="../complex/operator.html" class="wikilink2" title="complex:complex_operators" rel="nofollow">Operators</a></td><td class="col1">arithmetic of complex numbers, equality of complex numbers, IO of complex numbers</td>
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<td class="col0"><a href="../complex/abs.html" class="wikilink1" title="complex:abs">abs</a></td><td class="col1">absolute value of a complex number</td>
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<td class="col0"><a href="../complex/arg.html" class="wikilink1" title="complex:arg">arg</a></td><td class="col1">argument (angle) of a complex number</td>
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<td class="col0"><a href="../complex/conj.html" class="wikilink1" title="complex:conj">conj</a></td><td class="col1">conjugate of a complex number</td>
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<td class="col0"><a href="../complex/cos.html" class="wikilink2" title="complex:cos" rel="nofollow">cos</a></td><td class="col1">cosine of a complex number</td>
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<td class="col0"><a href="../complex/cosh.html" class="wikilink2" title="complex:cosh" rel="nofollow">cosh</a></td><td class="col1">hyperbolic cosine of a complex number</td>
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<td class="col0"><a href="../complex/exp.html" class="wikilink2" title="complex:exp" rel="nofollow">exp</a></td><td class="col1">exponential of a complex number</td>
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<td class="col0"><a href="../complex/imag.html" class="wikilink1" title="complex:imag">imag</a></td><td class="col1">imaginary part of a complex number</td>
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<td class="col0"><a href="../complex/log.html" class="wikilink2" title="complex:log" rel="nofollow">log</a></td><td class="col1">natural logarithm of a complex number</td>
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<td class="col0"><a href="../complex/log10.html" class="wikilink2" title="complex:log10" rel="nofollow">log10</a></td><td class="col1">base-10 logarithm of a complex number</td>
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<td class="col0"><a href="../complex/norm.html" class="wikilink1" title="complex:norm">norm</a></td><td class="col1">square of the absolute value of a complex number</td>
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<td class="col0"><a href="../complex/polar.html" class="wikilink1" title="complex:polar">polar</a></td><td class="col1">constructs a complex number from polar coordinates</td>
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<td class="col0"><a href="../complex/pow.html" class="wikilink2" title="complex:pow" rel="nofollow">pow</a></td><td class="col1">raising a complex number to a power, raising to a complex number power, or both</td>
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<td class="col0"><a href="../complex/real.html" class="wikilink1" title="complex:real">real</a></td><td class="col1">real part of a complex number</td>
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<td class="col0"><a href="../complex/sin.html" class="wikilink2" title="complex:sin" rel="nofollow">sin</a></td><td class="col1">sine of a complex number</td>
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<td class="col0"><a href="../complex/sinh.html" class="wikilink2" title="complex:sinh" rel="nofollow">sinh</a></td><td class="col1">hyperbolic sine of a complex number</td>
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<td class="col0"><a href="../complex/sqrt.html" class="wikilink2" title="complex:sqrt" rel="nofollow">sqrt</a></td><td class="col1">square root of a complex number</td>
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<td class="col0"><a href="../complex/tan.html" class="wikilink2" title="complex:tan" rel="nofollow">tan</a></td><td class="col1">tangent of a complex number</td>
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<td class="col0"><a href="../complex/tanh.html" class="wikilink2" title="complex:tanh" rel="nofollow">tanh</a></td><td class="col1">hyperbolic tangent of a complex number</td>
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