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 |
.
std::uniform_int_distribution
satisfies all requirements of RandomNumberDistribution
.
Template parameters
IntType | - | The result type generated by the generator. The effect is undefined if 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 | IntType |
param_type | the type of the parameter set, see RandomNumberDistribution . |
Member functions
constructs new distribution (public member function) | |
resets the internal state of the distribution (public member function) | |
Generation | |
operator()
| generates the next random number in the distribution (public member function) |
Characteristics | |
returns the distribution parameters (public member function) | |
gets or sets the distribution parameter object (public member function) | |
returns the minimum potentially generated value (public member function) | |
returns the maximum potentially generated value (public member function) |
Non-member functions
compares two distribution objects (function) | |
performs stream input and output on pseudo-random number distribution (function template) |
Example
This program simulates throwing 6-sided dice.
#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
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