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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_multiprecision.tut.complex"></a><a class="link" href="complex.html" title="Complex Number Types">Complex Number Types</a>
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<p>
The following backends provide complex number arithmetic:
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<p>
Backend Type
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Header
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<p>
Radix
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Dependencies
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Pros
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Cons
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<td>
<p>
<code class="computeroutput"><span class="identifier">cpp_complex</span></code>
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<td>
<p>
boost/multiprecision/cpp_complex.hpp
</p>
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<td>
<p>
2
</p>
</td>
<td>
<p>
None
</p>
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<td>
<p>
An all C++ Boost-licensed implementation.
</p>
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<p>
Slower than <a href="http://www.multiprecision.org" target="_top">MPC</a>.
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<p>
<code class="computeroutput"><span class="identifier">mpc</span></code>
</p>
</td>
<td>
<p>
boost/multiprecision/mpc.hpp
</p>
</td>
<td>
<p>
2
</p>
</td>
<td>
<p>
<a href="http://www.multiprecision.org" target="_top">MPC</a>
</p>
</td>
<td>
<p>
Very fast and efficient back-end.
</p>
</td>
<td>
<p>
Dependency on LGLP-licensed [MPC] library.
</p>
</td>
</tr>
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<p>
<code class="computeroutput"><span class="identifier">compplex128</span></code>
</p>
</td>
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<p>
boost/multiprecision/complex128.hpp
</p>
</td>
<td>
<p>
2
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">__float128</span></code> and
libquadmath
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<p>
Very fast and efficient number type.
</p>
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<p>
128-bit precision only, and resticted to GCC.
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<p>
<code class="computeroutput"><span class="identifier">complex_adaptor</span></code>
</p>
</td>
<td>
<p>
boost/multiprecision/complex_adaptor.hpp
</p>
</td>
<td>
<p>
-
</p>
</td>
<td>
<p>
none
</p>
</td>
<td>
<p>
Can convert any backend type into a complex number backend.
</p>
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<p>
Not a number in its own right, and hard to use as a result.
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