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Generates a discrete integer distribution.
template<class IntType = int>
class discrete_distribution {
public:
typedef IntType result_type;
struct param_type;
discrete_distribution();
explicit discrete_distribution(const param_type& par0);
template<class Fn>
discrete_distribution(size_t count,
double low, double high, Fn func);
explicit discrete_distribution(const param_type& par0);
std::vector<double> probabilities() const;
param_type param() const;
void param(const param_type& par0);
result_type min() const;
result_type max() const;
void reset();
template<class Engine>
result_type operator()(Engine& eng);
template<class Engine>
result_type operator()(Engine& eng,
const param_type& par0);
private:
std::vector<double> stored_p;
};
Parameters
Parameter |
Description |
|---|---|
IntType |
The integer result type. |
Remarks
This template class describes a <random> that produces values of a user-specified integral type distributed according to a uniform-width histogram of probabilities.
Three distributions are very similar:
A discrete_distribution has uniform-width intervals with uniform probability in each interval.
A piecewise_constant_distribution Class has varying-width intervals with uniform probability in each interval.
A piecewise_linear_distribution Class has varying-width intervals with linearly varying probability over each interval.
Requirements
Header: <random>
Namespace: std
See Also
Reference
discrete_distribution::discrete_distribution
discrete_distribution::operator()