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poisson_distribution::param_type

Stores the parameters of the distribution.

struct param_type {
    typedef poisson_distribution<IntType> distribution_type;
    param_type(double mean = 1.0);
    RealType mean() const;
    ....
    bool operator==(const param_type& right) const;
    bool operator!=(const param_type& right) const;
};

Precondition: 0.0 < mean

This structure can be passed to the distribution's class constructor at instantiation, to the param() member function to set the stored parameters of an existing distribution, and to operator() to be used in place of the stored parameters.

Header: <random>

Namespace: std

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