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26<div class="titlepage"><div><div><h3 class="title">
27<a name="boost_multiprecision.tut.complex"></a><a class="link" href="complex.html" title="Complex Number Types">Complex Number Types</a>
28</h3></div></div></div>
29<div class="toc"><dl class="toc">
30<dt><span class="section"><a href="complex/cpp_complex.html">cpp_complex</a></span></dt>
31<dt><span class="section"><a href="complex/mpc_complex.html">mpc_complex</a></span></dt>
32<dt><span class="section"><a href="complex/complex128.html">complex128</a></span></dt>
33<dt><span class="section"><a href="complex/complex_adaptor.html">complex_adaptor</a></span></dt>
34</dl></div>
35<p>
36        The following backends provide complex number arithmetic:
37      </p>
38<div class="informaltable"><table class="table">
39<colgroup>
40<col>
41<col>
42<col>
43<col>
44<col>
45<col>
46</colgroup>
47<thead><tr>
48<th>
49                <p>
50                  Backend Type
51                </p>
52              </th>
53<th>
54                <p>
55                  Header
56                </p>
57              </th>
58<th>
59                <p>
60                  Radix
61                </p>
62              </th>
63<th>
64                <p>
65                  Dependencies
66                </p>
67              </th>
68<th>
69                <p>
70                  Pros
71                </p>
72              </th>
73<th>
74                <p>
75                  Cons
76                </p>
77              </th>
78</tr></thead>
79<tbody>
80<tr>
81<td>
82                <p>
83                  <code class="computeroutput"><span class="identifier">cpp_complex</span></code>
84                </p>
85              </td>
86<td>
87                <p>
88                  boost/multiprecision/cpp_complex.hpp
89                </p>
90              </td>
91<td>
92                <p>
93                  2
94                </p>
95              </td>
96<td>
97                <p>
98                  None
99                </p>
100              </td>
101<td>
102                <p>
103                  An all C++ Boost-licensed implementation.
104                </p>
105              </td>
106<td>
107                <p>
108                  Slower than <a href="http://www.multiprecision.org" target="_top">MPC</a>.
109                </p>
110              </td>
111</tr>
112<tr>
113<td>
114                <p>
115                  <code class="computeroutput"><span class="identifier">mpc</span></code>
116                </p>
117              </td>
118<td>
119                <p>
120                  boost/multiprecision/mpc.hpp
121                </p>
122              </td>
123<td>
124                <p>
125                  2
126                </p>
127              </td>
128<td>
129                <p>
130                  <a href="http://www.multiprecision.org" target="_top">MPC</a>
131                </p>
132              </td>
133<td>
134                <p>
135                  Very fast and efficient back-end.
136                </p>
137              </td>
138<td>
139                <p>
140                  Dependency on LGLP-licensed [MPC] library.
141                </p>
142              </td>
143</tr>
144<tr>
145<td>
146                <p>
147                  <code class="computeroutput"><span class="identifier">compplex128</span></code>
148                </p>
149              </td>
150<td>
151                <p>
152                  boost/multiprecision/complex128.hpp
153                </p>
154              </td>
155<td>
156                <p>
157                  2
158                </p>
159              </td>
160<td>
161                <p>
162                  <code class="computeroutput"><span class="identifier">__float128</span></code> and
163                  libquadmath
164                </p>
165              </td>
166<td>
167                <p>
168                  Very fast and efficient number type.
169                </p>
170              </td>
171<td>
172                <p>
173                  128-bit precision only, and resticted to GCC.
174                </p>
175              </td>
176</tr>
177<tr>
178<td>
179                <p>
180                  <code class="computeroutput"><span class="identifier">complex_adaptor</span></code>
181                </p>
182              </td>
183<td>
184                <p>
185                  boost/multiprecision/complex_adaptor.hpp
186                </p>
187              </td>
188<td>
189                <p>
190                  -
191                </p>
192              </td>
193<td>
194                <p>
195                  none
196                </p>
197              </td>
198<td>
199                <p>
200                  Can convert any backend type into a complex number backend.
201                </p>
202              </td>
203<td>
204                <p>
205                  Not a number in its own right, and hard to use as a result.
206                </p>
207              </td>
208</tr>
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214<td align="right"><div class="copyright-footer">Copyright © 2002-2020 John
215      Maddock and Christopher Kormanyos<p>
216        Distributed under the Boost Software License, Version 1.0. (See accompanying
217        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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