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std::unifor...distribution(3) C++ Standard Libarystd::unifor...distribution(3)

NAME
       std::uniform_int_distribution - std::uniform_int_distribution

Synopsis
	  Defined in header <random>
	  template< class IntType = int	>  (since C++11)
	  class	uniform_int_distribution;

	  Produces  random integer values \(\small i\)i, uniformly distributed
       on the closed
	  interval \(\small[a, b]\)[a, b], that	is, distributed	 according  to
       the discrete
	  probability function

	  \({\small P(i|a,b) =}\frac{1}{b - a +	1}\)P(i|a,b) =

	  1
	  b  a + 1

	  .

	  std::uniform_int_distribution	satisfies all requirements of
	  RandomNumberDistribution.

Template parameters
		    The	 result	type generated by the generator. The effect is
       undefined if
	  IntType - this is not	one of short, int, long, long  long,  unsigned
       short, unsigned
		    int, unsigned long,	or unsigned long long.

Member types
	  Member type	      Definition
	  result_type (C++11) IntType
	  param_type  (C++11)	the  type of the parameter set,	see RandomNum-
       berDistribution.

Member functions
	  constructor	constructs new distribution
	  (C++11)	(public	member function)
	  reset		resets the internal state of the distribution
	  (C++11)	(public	member function)

Generation
	  operator()	generates the next random number in the	distribution
	  (C++11)	(public	member function)

Characteristics
	  a		returns	the distribution parameters
	  b		(public	member function)
	  (C++11)
	  param		gets or	sets the distribution parameter	object
	  (C++11)	(public	member function)
	  min		returns	the minimum potentially	generated value
	  (C++11)	(public	member function)
	  max		returns	the maximum potentially	generated value
	  (C++11)	(public	member function)

Non-member functions
	  operator==
	  operator!=		    compares two distribution objects
	  (C++11)		    (function)
	  (C++11)(removed in C++20)
	  operator<<		     performs  stream  input  and  output   on
       pseudo-random number
	  operator>>		    distribution
	  (C++11)		    (function template)

Example
	  This program simulates throwing 6-sided dice.

       // Run this code

	#include <iostream>
	#include <random>

	int main()
	{
	    std::random_device rd;  // a seed source for the random number en-
       gine
	    std::mt19937  gen(rd());  //  mersenne_twister_engine  seeded with
       rd()
	    std::uniform_int_distribution<> distrib(1, 6);

	    // Use distrib to transform	the random unsigned int
	    // generated by gen	into an	int in [1, 6]
	    for	(int n = 0; n != 10; ++n)
		std::cout << distrib(gen) << ' ';
	    std::cout << '\n';
	}

Possible output:
	1 1 6 5	2 2 5 5	6 2

http://cppreference.com		  2024.06.10	 std::unifor...distribution(3)

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