26 Numerics library [numerics]

26.6 Random number generation [rand]

26.6.9 Random number distribution class templates [rand.dist]

26.6.9.3 Bernoulli distributions [rand.dist.bern]

26.6.9.3.2 Class template binomial_­distribution [rand.dist.bern.bin]

A binomial_­distribution random number distribution produces integer values distributed according to the discrete probability function
template<class IntType = int> class binomial_distribution { public: // types using result_type = IntType; using param_type = unspecified; // constructors and reset functions binomial_distribution() : binomial_distribution(1) {} explicit binomial_distribution(IntType t, double p = 0.5); explicit binomial_distribution(const param_type& parm); void reset(); // generating functions template<class URBG> result_type operator()(URBG& g); template<class URBG> result_type operator()(URBG& g, const param_type& parm); // property functions IntType t() const; double p() const; param_type param() const; void param(const param_type& parm); result_type min() const; result_type max() const; };
explicit binomial_distribution(IntType t, double p = 0.5);
Preconditions: and .
Remarks: t and p correspond to the respective parameters of the distribution.
IntType t() const;
Returns: The value of the t parameter with which the object was constructed.
double p() const;
Returns: The value of the p parameter with which the object was constructed.