C++ random number generators code example

Example 1: c++ random

#include <cstdlib>
#include <iostream>
#include <ctime>
 
int main() 
{
    std::srand(std::time(nullptr)); // use current time as seed for random generator
    int random_variable = std::rand();
    std::cout << "Random value on [0 " << RAND_MAX << "]: " 
              << random_variable << '\n';
}

Example 2: random numbers c++

/*The problem with srand(time(NULL)) and rand() is that if you use them
in a loop it'll probably be executed during the same clock period
and therefore rand() will return the same number. To solve this
you can use the library random to help you.*/

#include <random>

std::random_device rd;
std::mt19937 e{rd()};
std::uniform_int_distribution<int> dist{1, 5}; //Limits of the interval
//Returns a random number between {1, 5} with
dist(e);