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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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