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| <div><h2 class="title"> |
| <a name="boost_random"></a>Chapter 16. Boost.Random</h2></div> |
| <div><div class="author"><h3 class="author"> |
| <span class="firstname">Jens</span> <span class="surname">Maurer</span> |
| </h3></div></div> |
| <div><p class="copyright">Copyright © 2000 -2005 Jens Maurer, 2009 Steven Watanabe</p></div> |
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| <a name="id2462665"></a><p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 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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| <p><b>Table of Contents</b></p> |
| <dl> |
| <dt><span class="section"><a href="boost_random.html#boost_random.introduction">Introduction</a></span></dt> |
| <dt><span class="section"><a href="boost_random/tutorial.html">Tutorial</a></span></dt> |
| <dd><dl> |
| <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_integers_in_a_range">Generating |
| integers in a range</a></span></dt> |
| <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_integers_with_different_probabilities">Generating |
| integers with different probabilities</a></span></dt> |
| </dl></dd> |
| <dt><span class="section"><a href="boost_random/reference.html">Reference</a></span></dt> |
| <dd><dl> |
| <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.concepts">Concepts</a></span></dt> |
| <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.generators">Generators</a></span></dt> |
| <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.distributions">Distributions</a></span></dt> |
| <dt><span class="section"><a href="boost_random/reference.html#headers">Headers</a></span></dt> |
| </dl></dd> |
| <dt><span class="section"><a href="boost_random/performance.html">Performance</a></span></dt> |
| <dt><span class="section"><a href="boost_random/rationale.html">Rationale</a></span></dt> |
| <dt><span class="section"><a href="boost_random/history_and_acknowledgements.html">History and |
| Acknowledgements</a></span></dt> |
| </dl> |
| </div> |
| <div class="section"> |
| <div class="titlepage"><div><div><h2 class="title" style="clear: both"> |
| <a name="boost_random.introduction"></a><a class="link" href="boost_random.html#boost_random.introduction" title="Introduction">Introduction</a> |
| </h2></div></div></div> |
| <p> |
| Random numbers are useful in a variety of applications. The Boost Random Number |
| Library (Boost.Random for short) provides a variety of <a class="link" href="boost_random/reference.html#boost_random.reference.generators" title="Generators">generators</a> |
| and <a class="link" href="boost_random/reference.html#boost_random.reference.distributions" title="Distributions">distributions</a> |
| to produce random numbers having useful properties, such as uniform distribution. |
| </p> |
| <p> |
| You should read the <a class="link" href="boost_random/reference.html#boost_random.reference.concepts" title="Concepts">concepts |
| documentation</a> for an introduction and the definition of the basic concepts. |
| For a quick start, it may be sufficient to have a look at <a href="../../libs/random/example/random_demo.cpp" target="_top">random_demo.cpp</a>. |
| </p> |
| <p> |
| For a very quick start, here's an example: |
| </p> |
| <pre class="programlisting"><code class="computeroutput"><a class="link" href="boost/mt19937.html" title="Type definition mt19937">boost::mt19937</a></code> <span class="identifier">rng</span><span class="special">;</span> <span class="comment">// produces randomness out of thin air |
| </span> <span class="comment">// see pseudo-random number generators |
| </span><code class="computeroutput"><a class="link" href="boost/uniform_int.html" title="Class template uniform_int">boost::uniform_int</a></code><> <span class="identifier">six</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">6</span><span class="special">);</span> <span class="comment">// distribution that maps to 1..6 |
| </span> <span class="comment">// see random number distributions |
| </span><code class="computeroutput"><a class="link" href="boost/variate_generator.html" title="Class template variate_generator">boost::variate_generator</a></code><span class="special"><</span><code class="computeroutput"><a class="link" href="boost/mt19937.html" title="Type definition mt19937">boost::mt19937</a></code><span class="special">&,</span> <code class="computeroutput"><a class="link" href="boost/uniform_int.html" title="Class template uniform_int">boost::uniform_int</a></code><span class="special"><></span> <span class="special">></span> |
| <span class="identifier">die</span><span class="special">(</span><span class="identifier">rng</span><span class="special">,</span> <span class="identifier">six</span><span class="special">);</span> <span class="comment">// glues randomness with mapping |
| </span><span class="keyword">int</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">die</span><span class="special">();</span> <span class="comment">// simulate rolling a die |
| </span></pre> |
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| <td align="left"><p><small>Last revised: November 10, 2010 at 00:45:18 GMT</small></p></td> |
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