Have a look at this Mersenne Twister random-number generator function that I’ve written based on what I found on SO.

As I am a beginner and don’t understand half of the stuff below, I would very much appreciate if you guided me a little on my journey to improving this random number generator.

• I don’t need it to be fast, I just want it to be secure.

• I want it to be more or less the most secure way of generating numbers.

• All that, because I plan on generating random passwords with it later on.

#include <iostream> #include <random>  unsigned long long int random_integer(unsigned long long int rand_min, unsigned long long int rand_max) {      // initialize = seed the random device     std::random_device random_device;      // use Mersenne Twister as random-number generator engine     std::mt19937 random_number_generator(random_device());      // number distribution, guaranteed unbiased      std::uniform_int_distribution<int> number_distribution(rand_min, rand_max);      return number_distribution(random_number_generator);  }  int main() {      for (int i = 1; i <= 10; i++)     {         std::cout << random_integer(1, 1000) << std::endl;     }      return 0;  } 

Notes:

• I’m on Linux.

• Compiler is g++5.

• Standard being C++17.