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Showing content from https://cplusplus.com/reference/random/binomial_distribution/binomial_distribution/ below:

public member function

<random>

explicit binomial_distribution ( result_type t = 1, double p = 0.5 );

explicit binomial_distribution ( const param_type& parm );

Construct binomial distribution

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.

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// binomial_distribution example
#include <iostream>
#include <chrono>
#include <random>

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<int> 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;
}

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

binomial_distribution::reset

Reset distribution (public member function)

binomial_distribution::param

Distribution parameters (public member function)

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