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Showing content from https://cplusplus.com/negative_binomial_distribution::negative_binomial_distribution below:

public member function

<random>

explicit negative_binomial_distribution ( result_type k = 1, double p = 0.5 );

explicit negative_binomial_distribution ( const param_type& parm );

Construct negative binomial distribution

k

Parameter k of the negative binomial distribution.
This represents the number of unsuccessful trials that stops the count of successful 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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// negative_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::negative_binomial_distribution<int> distribution (5,0.5);

  std::cout << "some negative binomial results (k=5,p=0.5): ";
  for (int i=0; i<10; ++i)
    std::cout << distribution(generator) << " ";

  std::cout << std::endl;

  return 0;
}

some negative binomial results (k=5,p=0.5): 1 1 6 4 4 5 2 9 2 4 

negative_binomial_distribution::reset

Reset distribution (public member function)

negative_binomial_distribution::param

Distribution parameters (public member function)

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