std::tr1::bernoulli_distribution.3cxx

Langue: en

Version: 342016 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

Sommaire

NAME

std::tr1::bernoulli_distribution -

A Bernoulli random number distribution.

SYNOPSIS


Public Types


typedef int input_type

typedef bool result_type

Public Member Functions


bernoulli_distribution (double __p=0.5)

template<class _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator &__urng)

double p () const

void reset ()

Friends


template<typename _CharT , typename _Traits > std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const bernoulli_distribution &__x)

template<typename _CharT , typename _Traits > std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, bernoulli_distribution &__x)

Detailed Description

A Bernoulli random number distribution.

Generates a sequence of true and false values with likelihood $ p $ that true will come up and $ (1 - p) $ that false will appear.

Definition at line 1688 of file tr1_impl/random.

Constructor & Destructor Documentation

std::tr1::bernoulli_distribution::bernoulli_distribution (double __p = 0.5) [inline, explicit]Constructs a Bernoulli distribution with likelihood p.

Parameters:

__p [IN] The likelihood of a true result being returned. Must be in the interval $ [0, 1] $.

Definition at line 1702 of file tr1_impl/random.

Member Function Documentation

template<class _UniformRandomNumberGenerator > result_type std::tr1::bernoulli_distribution::operator() (_UniformRandomNumberGenerator & __urng) [inline]Gets the next value in the Bernoullian sequence.

Definition at line 1728 of file tr1_impl/random.

double std::tr1::bernoulli_distribution::p () const [inline]Gets the p parameter of the distribution.

Definition at line 1712 of file tr1_impl/random.

void std::tr1::bernoulli_distribution::reset () [inline]Resets the distribution state.

Does nothing for a Bernoulli distribution.

Definition at line 1721 of file tr1_impl/random.

template<typename _CharT , typename _Traits > std::basic_ostream<_CharT, _Traits>& operator<< (std::basic_ostream< _CharT, _Traits > & __os, const bernoulli_distribution & __x) [friend]Inserts a bernoulli_distribution random number distribution __x into the output stream __os.

Parameters:

__os An output stream.
__x A bernoulli_distribution random number distribution.

Returns:

The output stream with the state of __x inserted or in an error state.

Definition at line 823 of file random.tcc.

template<typename _CharT , typename _Traits > std::basic_istream<_CharT, _Traits>& operator>> (std::basic_istream< _CharT, _Traits > & __is, bernoulli_distribution & __x) [friend]Extracts a bernoulli_distribution random number distribution __x from the input stream __is.

Parameters:

__is An input stream.
__x A bernoulli_distribution random number generator engine.

Returns:

The input stream with __x extracted or in an error state.

Definition at line 1761 of file tr1_impl/random.

Author

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