A negative_binomial_distribution random number distribution produces random integers i≥0 distributed according to the discrete probability function
P(i|k,p)=(k+i−1i)⋅pk⋅(1−p)i.
[ Note: This implies that P(i|k,p) is undefined when p == 1. — end note ]
template<class IntType = int>
class negative_binomial_distribution {
public:
using result_type = IntType;
using param_type = unspecified;
explicit negative_binomial_distribution(IntType k = 1, double p = 0.5);
explicit negative_binomial_distribution(const param_type& parm);
void reset();
template<class URBG>
result_type operator()(URBG& g);
template<class URBG>
result_type operator()(URBG& g, const param_type& parm);
IntType k() const;
double p() const;
param_type param() const;
void param(const param_type& parm);
result_type min() const;
result_type max() const;
};
explicit negative_binomial_distribution(IntType k = 1, double p = 0.5);
Effects: Constructs a negative_binomial_distribution object; k and p correspond to the respective parameters of the distribution.
IntType k() const;
Returns: The value of the k parameter with which the object was constructed.
double p() const;
Returns: The value of the p parameter with which the object was constructed.
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