1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 5<title>Chapter 33. Boost.Random</title> 6<link rel="stylesheet" href="../../doc/src/boostbook.css" type="text/css"> 7<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 8<link rel="home" href="index.html" title="The Boost C++ Libraries BoostBook Documentation Subset"> 9<link rel="up" href="libraries.html" title="Part I. The Boost C++ Libraries (BoostBook Subset)"> 10<link rel="prev" href="proto/appendices.html" title="Appendices"> 11<link rel="next" href="boost_random/tutorial.html" title="Tutorial"> 12</head> 13<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 14<table cellpadding="2" width="100%"><tr> 15<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../boost.png"></td> 16<td align="center"><a href="../../index.html">Home</a></td> 17<td align="center"><a href="../../libs/libraries.htm">Libraries</a></td> 18<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 19<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 20<td align="center"><a href="../../more/index.htm">More</a></td> 21</tr></table> 22<hr> 23<div class="spirit-nav"> 24<a accesskey="p" href="proto/appendices.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="libraries.html"><img src="../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="boost_random/tutorial.html"><img src="../../doc/src/images/next.png" alt="Next"></a> 25</div> 26<div class="chapter"> 27<div class="titlepage"><div> 28<div><h2 class="title"> 29<a name="boost_random"></a>Chapter 33. 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 © 2000-2005 Jens Maurer</p></div> 34<div><p class="copyright">Copyright © 2009, 2010 Steven Watanabe</p></div> 35<div><div class="legalnotice"> 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> 40</div></div> 41</div></div> 42<div class="toc"> 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><> <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: August 11, 2020 at 15:03:11 GMT</small></p></td> 99<td align="right"><div class="copyright-footer"></div></td> 100</tr></table> 101<hr> 102<div class="spirit-nav"> 103<a accesskey="p" href="proto/appendices.html"><img src="../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="libraries.html"><img src="../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="boost_random/tutorial.html"><img src="../../doc/src/images/next.png" alt="Next"></a> 104</div> 105</body> 106</html> 107
