std::binomial_distribution<IntType>::binomial_distribution

`binomial_distribution() : binomial_distribution(1) {}`	(1)	(since C++11)
`explicit binomial_distribution( IntType t, double p = 0.5 );`	(2)	(since C++11)
`explicit binomial_distribution( const param_type& params );`	(3)	(since C++11)

Constructs a new distribution object.

2) Uses t and p as the distribution parameters.

3) Uses params as the distribution parameter.

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

Requires that 0 ≤ p ≤ 1 and 0 ≤ t.

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

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