Files
cc3k/src/rng.cc

42 lines
879 B
C++

#include "rng.h"
RNG::RNG(): init_seed(time(0)), curr_rand_num(0) {
srand(init_seed);
}
RNG::RNG(const unsigned int seed): init_seed(seed), curr_rand_num(0) {
srand(init_seed);
}
int RNG::rand_num() {
return curr_rand_num = rand();
}
int RNG::rand_between(const int lower_bound, const int upper_bound) {
curr_rand_num = rand();
return lower_bound + (curr_rand_num % (upper_bound - lower_bound));
}
int RNG::rand_under(const int upper_bound) {
curr_rand_num = rand();
return curr_rand_num % upper_bound;
}
unsigned int RNG::get_init_seed() const {
return init_seed;
}
int RNG::get_curr_rand_num() const {
return curr_rand_num;
}
bool RNG::trial(fraction &psuccess) {
return (rand() % psuccess.denominator) < psuccess.numerator;
}
bool RNG::coin_flip() const {
return rand() % 2;
}