public member function
<random>

# std::binomial_distribution::(constructor)

(1) ```explicit binomial_distribution ( result_type t = 1, double p = 0.5 ); ``` `explicit binomial_distribution ( const param_type& parm );`
Construct binomial distribution
Constructs a binomial_distribution object, adopting the distribution parameters specified either by t and p or by object parm.

### Parameters

t
The upper bound of the range ([0,t]) of possible values the distribution can generate.
This represents the number of independent Bernoulli-distributed experiments each generated value is said to simulate.
result_type is a member type that represents the type of the random numbers generated on each call to operator(). It is defined as an alias of the first class template parameter (IntType).
p
Probability of success.
This represents the probability of success on each of the independent Bernoulli-distributed experiments each generated value is said to simulate.
This shall be a value between 0.0 and 1.0 (both included).
parm
An object representing the distribution's parameters, obtained by a call to member function param.
param_type is a member type.

### Example

 ``123456789101112131415161718192021`` ``````// binomial_distribution example #include #include #include int main() { // construct a trivial random generator engine from a time-based seed: unsigned seed = std::chrono::system_clock::now().time_since_epoch().count(); std::default_random_engine generator (seed); std::binomial_distribution distribution (10,0.5); std::cout << "some binomial results (t=10,p=0.5): "; for (int i=0; i<10; ++i) std::cout << distribution(generator) << " "; std::cout << std::endl; return 0; }``````

Possible output:
 ```some binomial results (t=10,p=0.5): 5 5 4 5 4 5 6 4 5 4 ```

Constant.