I want generate a random vector including n elements in the range of [min,max], which works fine with the mersenne twister and my code below.
Obviously, every time I call my rand_vec function, I get the same output. But I need the random function to return different results each time I call it. Additionally, the whole process needs to be seeded, each time of execution the output has to be the same. So, seeding the twister in my function with std::random_device does not seem like a choice.
Also, this random function gets called from several subroutines of my program:
#include <iostream>
#include <vector>
#include <random>
std::vector<int> rand_vec(int n, int min, int max, std::mt19937 mt){
std::vector<int> to_return(n);
std::uniform_int_distribution<> my_dist(min, max);
for(int i = 0; i < n; i++){
to_return[i] = my_dist(mt);
}
return(to_return);
}
int main()
{
std::vector<int> to_print(5);
std::mt19937 mt;
mt = std::mt19937(100);
to_print = rand_vec(5, 0, 10, mt);
for(int i = 0; i < 5; i++){
std::cout << to_print[i] << " ";
}
std::cout << "\n\n";
to_print = rand_vec(5, 0, 10, mt);
for(int i = 0; i < 5; i++){
std::cout << to_print[i] << " ";
}
std::cout << "\n\n";
}
Compiled with /EHsc /nologo /W4 main.cpp
Compilation successful! Total compilation time: 359 ms
1 0 10 8 3
1 0 10 8 3
Total execution time: 562 ms
