Генератор случайных чисел (пример)

#include <iostream>
#include <ctime>
#include <random>
using namespace std;

mt19937 base_int_double(time(NULL)); // for int & double
mt19937_64 base_long_long(time(NULL)); // for long long

int main() {
  int n_1 = base_int_double(); // random int NOT from [L; R]
  double n_2 = base_int_double(); // random double NOT from [L; R]

  // random int from [L; R]
  uniform_int_distribution <int> interval_int(-128, 206);
  int a = interval_int(base_int_double);

  // random double from [L; R]
  uniform_real_distribution <double> interval_double(-205.5, 205.5);
  double b = interval_double(base_int_double);

  // random long long NOT from [L; R]
  long long c = base_long_long();

  // random long long from [L; R]
  uniform_int_distribution <long long> interval_long_long(-1e11, 1e11);
  long long d = interval_long_long(base_long_long);

  return 0;
}