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Ruta de la carpeta: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\random\binomial_distribution.hpp
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/* boost random/binomial_distribution.hpp header file * * Copyright Jens Maurer 2002 * Distributed under the Boost Software License, Version 1.0. (See * accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) * * See http://www.boost.org for most recent version including documentation. * * $Id: binomial_distribution.hpp 41369 2007-11-25 18:07:19Z bemandawes $ * */ #ifndef BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP #define BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP #include
#include
#include
namespace boost { // Knuth template
class binomial_distribution { public: typedef typename bernoulli_distribution
::input_type input_type; typedef IntType result_type; explicit binomial_distribution(IntType t_arg = 1, const RealType& p_arg = RealType(0.5)) : _bernoulli(p_arg), _t(t_arg) { assert(_t >= 0); assert(RealType(0) <= p_arg && p_arg <= RealType(1)); } // compiler-generated copy ctor and assignment operator are fine IntType t() const { return _t; } RealType p() const { return _bernoulli.p(); } void reset() { } template
result_type operator()(Engine& eng) { // TODO: This is O(_t), but it should be O(log(_t)) for large _t result_type n = 0; for(IntType i = 0; i < _t; ++i) if(_bernoulli(eng)) ++n; return n; } #if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) template
friend std::basic_ostream
& operator<<(std::basic_ostream
& os, const binomial_distribution& bd) { os << bd._bernoulli << " " << bd._t; return os; } template
friend std::basic_istream
& operator>>(std::basic_istream
& is, binomial_distribution& bd) { is >> std::ws >> bd._bernoulli >> std::ws >> bd._t; return is; } #endif private: bernoulli_distribution
_bernoulli; IntType _t; }; } // namespace boost #endif // BOOST_RANDOM_BINOMIAL_DISTRIBUTION_HPP
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