Warming up and using the Mersenne-Twister

generate.cpp

#include <string>
#include "mt.h"

warmupRNG();

std::uniform_int_distribution<int> rollTheDice(1, 6);

for (int i = 0; i < 1000; ++i)
  std::cout << rollTheDice(gRNG()) << ", ";
  
std::cout << std::flush;

mt.cpp

#include "mt.h"
#include <array>

std::mt19937 &gRNG() {
   static std::mt19937 *rng = new std::mt19937;
   return *rng;
}

void warmupRNG(void)
{
  std::array<int, std::mt19937::state_size> seed_data;
  std::random_device r;
  std::generate_n(seed_data.data(), seed_data.size(), std::ref(r));
  std::seed_seq seq(std::begin(seed_data), std::end(seed_data));
  gRNG().seed(seq);
}

mt.h

#include <random>

std::mt19937& gRNG();
extern void warmupRNG(void);