std::negative_binomial_distribution<IntType>::negative_binomial_distribution

negative_binomial_distribution() : negative_binomial_distribution(1) {}

(1)

(since C++11)

explicit negative_binomial_distribution( IntType k, double p = 0.5 );

(2)

(since C++11)

explicit negative_binomial_distribution( const param_type& params );

(3)

(since C++11)

Constructs a new distribution object.

2) Uses k and p as the distribution parameters.

3) Uses params as the distribution parameters.

k	-	the k distribution parameter (number of trial successes)
p	-	the p distribution parameter (probability of a trial generating `true`)
params	-	the distribution parameter set

Requires that 0 < p ≤ 1 and 0 < k.

If p == 1, subsequent calls to the operator() overload that does not accept a param_type object will cause undefined behavior.

The default-constructed std::negative_binomial_distribution is equivalent to the default-constructed std::geometric_distribution.

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
P0935R0	C++11	default constructor was explicit	made implicit