poisson_distribution Class

Generates a Poisson distribution.

template<class IntType = int,
    class RealType = double>
    class poisson_distribution {
    typedef T1 input_type;
    typedef IntType result_type;
    struct param_type;
    explicit poisson_distribution(RealType mean0 = RealType(1.0));
    explicit poisson_distribution(const param_type& par0);
    RealType mean() 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);
    RealType stored_mean;     // exposition only


The integer result type.


The floating-point engine value type.

The template class describes a distribution that produces values of a user-specified integral type with a Poisson distribution.

Header: <random>

Namespace: std