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  28 <div><h2 class="title">
  29 <a name="boost_random"></a>Chapter&#160;34.&#160;Boost.Random</h2></div>
  30 <div><div class="author"><h3 class="author">
  31 <span class="firstname">Jens</span> <span class="surname">Maurer</span>
  32 </h3></div></div>
  33 <div><p class="copyright">Copyright &#169; 2000-2005 Jens Maurer</p></div>
  34 <div><p class="copyright">Copyright &#169; 2009, 2010 Steven Watanabe</p></div>
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  36 <a name="boost_random.legal"></a><p>
  37         Distributed under the Boost Software License, Version 1.0. (See accompanying
  38         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>)
  39       </p>
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  43 <p><b>Table of Contents</b></p>
  44 <dl class="toc">
  45 <dt><span class="section"><a href="boost_random.html#boost_random.introduction">Introduction</a></span></dt>
  46 <dt><span class="section"><a href="boost_random/tutorial.html">Tutorial</a></span></dt>
  47 <dd><dl>
  48 <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_integers_in_a_range">Generating
  49       integers in a range</a></span></dt>
  50 <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_integers_with_different_probabilities">Generating
  51       integers with different probabilities</a></span></dt>
  52 <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_a_random_password">Generating
  53       a random password</a></span></dt>
  54 <dt><span class="section"><a href="boost_random/tutorial.html#boost_random.tutorial.generating_quasi_random_line_sphere_intersections">Generating
  55       quasi-random line-sphere intersections</a></span></dt>
  56 </dl></dd>
  57 <dt><span class="section"><a href="boost_random/reference.html">Reference</a></span></dt>
  58 <dd><dl>
  59 <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.concepts">Concepts</a></span></dt>
  60 <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.generators">Generators</a></span></dt>
  61 <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.distributions">Distributions</a></span></dt>
  62 <dt><span class="section"><a href="boost_random/reference.html#boost_random.reference.utilities">Utilities</a></span></dt>
  63 <dt><span class="section"><a href="boost_random/reference.html#headers">Headers</a></span></dt>
  64 </dl></dd>
  65 <dt><span class="section"><a href="boost_random/performance.html">Performance</a></span></dt>
  66 <dt><span class="section"><a href="boost_random/history_and_acknowledgements.html">History and
  67     Acknowledgements</a></span></dt>
  68 </dl>
  69 </div>
  70 <div class="section">
  71 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
  72 <a name="boost_random.introduction"></a><a class="link" href="boost_random.html#boost_random.introduction" title="Introduction">Introduction</a>
  73 </h2></div></div></div>
  74 <p>
  75       Random numbers are useful in a variety of applications. The Boost Random Number
  76       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>
  77       and <a class="link" href="boost_random/reference.html#boost_random.reference.distributions" title="Distributions">distributions</a>
  78       to produce random numbers having useful properties, such as uniform distribution.
  79     </p>
  80 <p>
  81       You should read the <a class="link" href="boost_random/reference.html#boost_random.reference.concepts" title="Concepts">concepts
  82       documentation</a> for an introduction and the definition of the basic concepts.
  83       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>.
  84     </p>
  85 <p>
  86       For a very quick start, here's an example:
  87     </p>
  88 <pre class="programlisting"><code class="computeroutput"><a class="link" href="boost/random/mt19937.html" title="Type definition mt19937">boost::random::mt19937</a></code> <span class="identifier">rng</span><span class="special">;</span>         <span class="comment">// produces randomness out of thin air</span>
  89                                     <span class="comment">// see pseudo-random number generators</span>
  90 <code class="computeroutput"><a class="link" href="boost/random/uniform_int_distribution.html" title="Class template uniform_int_distribution">boost::random::uniform_int_distribution</a></code>&lt;&gt; <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>
  91                                     <span class="comment">// distribution that maps to 1..6</span>
  92                                     <span class="comment">// see random number distributions</span>
  93 <span class="keyword">int</span> <span class="identifier">x</span> <span class="special">=</span> <span class="identifier">six</span><span class="special">(</span><span class="identifier">rng</span><span class="special">);</span>                   <span class="comment">// simulate rolling a die</span>
  94 </pre>
  95 </div>
  96 </div>
  97 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
  98 <td align="left"><p><small>Last revised: December 10, 2019 at 00:26:26 GMT</small></p></td>
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