std::uniform_int_distribution

 

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std::uniform_int_distribution

Member functions

uniform_int_distribution::uniform_int_distribution

uniform_int_distribution::reset

Generation

uniform_int_distribution::operator()

Characteristics

uniform_int_distribution::a

uniform_int_distribution::b

uniform_int_distribution::param

uniform_int_distribution::min

uniform_int_distribution::max

Non-member functions

operator== operator!=

operator<< operator>>

 

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

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

P(i|a,b) =

1

b − a + 1

.

Member types

Member type	Definition
result_type	IntType
param_type	the type of the parameter set, unspecified

Member functions

(constructor)	constructs new distribution (public member function)
reset	resets the internal state of the distribution (public member function)
Generation
operator()	generates the next random number in the distribution (public member function)
Characteristics
a	returns the a distribution parameter (minimum value) (public member function)
b	returns the b distribution parameter (maximum value) (public member function)
param	gets or sets the distribution parameter object (public member function)
min	returns the minimum potentially generated value (public member function)
max	returns the maximum potentially generated value (public member function)

Non-member functions

operator== operator!=	compares two distribution objects (function)
operator<< operator>>	performs stream input and output on pseudo-random number distribution (function)

Example

This program simulates throwing 6-sided dice.

run this code

#include <random>
#include <iostream>
 
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    std::uniform_int_distribution<> dis(1, 6);
 
    for (int n=0; n<10; ++n)
        std::cout << dis(gen) << ' ';
    std::cout << '\n';
}

Possible output:

1 1 6 5 2 2 5 5 6 2