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| <a name="boost_multiprecision.tut.rational"></a><a class="link" href="rational.html" title="Rational Number Types">Rational Number Types</a> |
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| <div class="toc"><dl> |
| <dt><span class="section"><a href="rational/cpp_rational.html">cpp_rational</a></span></dt> |
| <dt><span class="section"><a href="rational/gmp_rational.html">gmp_rational</a></span></dt> |
| <dt><span class="section"><a href="rational/tommath_rational.html">tommath_rational</a></span></dt> |
| <dt><span class="section"><a href="rational/br.html">Use With Boost.Rational</a></span></dt> |
| <dt><span class="section"><a href="rational/rational_adaptor.html">rational_adaptor</a></span></dt> |
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| <p> |
| The following back-ends provide rational number arithmetic: |
| </p> |
| <div class="informaltable"><table class="table"> |
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| <thead><tr> |
| <th> |
| <p> |
| Backend Type |
| </p> |
| </th> |
| <th> |
| <p> |
| Header |
| </p> |
| </th> |
| <th> |
| <p> |
| Radix |
| </p> |
| </th> |
| <th> |
| <p> |
| Dependencies |
| </p> |
| </th> |
| <th> |
| <p> |
| Pros |
| </p> |
| </th> |
| <th> |
| <p> |
| Cons |
| </p> |
| </th> |
| </tr></thead> |
| <tbody> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">cpp_rational</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| boost/multiprecision/cpp_int.hpp |
| </p> |
| </td> |
| <td> |
| <p> |
| 2 |
| </p> |
| </td> |
| <td> |
| <p> |
| None |
| </p> |
| </td> |
| <td> |
| <p> |
| An all C++ Boost-licensed implementation. |
| </p> |
| </td> |
| <td> |
| <p> |
| Slower than <a href="http://gmplib.org" target="_top">GMP</a>. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">gmp_rational</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| boost/multiprecision/gmp.hpp |
| </p> |
| </td> |
| <td> |
| <p> |
| 2 |
| </p> |
| </td> |
| <td> |
| <p> |
| <a href="http://gmplib.org" target="_top">GMP</a> |
| </p> |
| </td> |
| <td> |
| <p> |
| Very fast and efficient back-end. |
| </p> |
| </td> |
| <td> |
| <p> |
| Dependency on GNU licensed <a href="http://gmplib.org" target="_top">GMP</a> |
| library. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">tommath_rational</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| boost/multiprecision/tommath.hpp |
| </p> |
| </td> |
| <td> |
| <p> |
| 2 |
| </p> |
| </td> |
| <td> |
| <p> |
| <a href="http://libtom.org/?page=features&newsitems=5&whatfile=ltm" target="_top">libtommath</a> |
| </p> |
| </td> |
| <td> |
| <p> |
| All C/C++ implementation that's Boost Software Licence compatible. |
| </p> |
| </td> |
| <td> |
| <p> |
| Slower than <a href="http://gmplib.org" target="_top">GMP</a>. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">rational_adaptor</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| boost/multiprecision/rational_adaptor.hpp |
| </p> |
| </td> |
| <td> |
| <p> |
| N/A |
| </p> |
| </td> |
| <td> |
| <p> |
| none |
| </p> |
| </td> |
| <td> |
| <p> |
| All C++ adaptor that allows any integer back-end type to be used |
| as a rational type. |
| </p> |
| </td> |
| <td> |
| <p> |
| Requires an underlying integer back-end type. |
| </p> |
| </td> |
| </tr> |
| <tr> |
| <td> |
| <p> |
| <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">rational</span></code> |
| </p> |
| </td> |
| <td> |
| <p> |
| boost/rational.hpp |
| </p> |
| </td> |
| <td> |
| <p> |
| N/A |
| </p> |
| </td> |
| <td> |
| <p> |
| None |
| </p> |
| </td> |
| <td> |
| <p> |
| A C++ rational number type that can used with any <code class="computeroutput"><span class="identifier">number</span></code> integer type. |
| </p> |
| </td> |
| <td> |
| <p> |
| The expression templates used by <code class="computeroutput"><span class="identifier">number</span></code> |
| end up being "hidden" inside <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">rational</span></code>: |
| performance may well suffer as a result. |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2002-2013 John Maddock and Christopher Kormanyos<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
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