C++ random generate int in range

randomint.cpp

// source: https://stackoverflow.com/questions/288739/generate-random-numbers-uniformly-over-an-entire-range
#include <iostream>
#include <random>

int main() {
  const int range_from  = 0;
  const int range_to    = 6;
  std::random_device                  rand_dev;
  std::mt19937                        generator(rand_dev());
  std::uniform_int_distribution<int>  distr(range_from, range_to);
  
  cerr << distr(generator) << endl;
}