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// discrete_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);
// in a regular die, every number is equally likely:
std::uniform_int_distribution<int> regular_die (1,6);
// in this loaded die, the 6 is three times more likely:
std::discrete_distribution<int> loaded_die {0,1,1,1,1,1,3};
int regular_score = 0;
int loaded_score = 0;
for (int i=0; i<1000; ++i) {
int regular_roll = regular_die(generator);
int loaded_roll = loaded_die(generator);
if (regular_roll<loaded_roll) ++loaded_score;
else if (regular_roll>loaded_roll) ++regular_score;
}
std::cout << "after 1000 experiments:" << std::endl;
std::cout << "regular die won: " << regular_score << " times." << std::endl;
std::cout << "loaded die won: " << loaded_score << " times." << std::endl;
std::cout << "ties: " << (1000-regular_score-loaded_score) << std::endl;
return 0;
}
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