bernoulli_distribution::operator()
Returns a random value.
template<class Engine>
result_type operator()(Engine& eng);
Parameters
Engine
The type of the random engine.eng
The random engine.
Remarks
The member function uses the engine eng as a source of uniformly distributed random integer values and returns true with probability given by the stored value stored_p.
Example
// std_tr1__random__bernoulli_distribution_operator_fn.cpp
// compile with: /EHsc
#include <random>
#include <iostream>
typedef std::tr1::mt19937 Myeng;
typedef std::tr1::bernoulli_distribution Mydist;
int main()
{
Myeng eng;
Mydist dist(0.6);
Mydist::input_type engval = eng();
Mydist::result_type distval = dist(eng);
distval = distval; // to quiet "unused" warnings
engval = engval;
std::cout << "p == " << dist.p() << std::endl;
dist.reset(); // discard any cached values
std::cout << "a random value == " << std::boolalpha
<< dist(eng) << std::endl;
std::cout << "a random value == " << std::boolalpha
<< dist(eng) << std::endl;
std::cout << "a random value == " << std::boolalpha
<< dist(eng) << std::endl;
return (0);
}
p == 0.6 a random value == false a random value == false a random value == true
Requirements
Header: <random>
Namespace: std::tr1