/* Test rand() distribution by throwing a die repeatedly (TestRandomDie.cpp) */
#include <iostream>
#include <iomanip>
#include <cstdlib>  // for rand(), srand()
#include <ctime>    // for time()
using namespace std;

const int TOTAL_COUNT = 2000000;  // Close to INT_MAX
const int NUM_FACES = 6;
int frequencies[6] = {0}; // frequencies of 0 to 5, init to zero

int main() {
   srand(time(0)); // seed random number generator with current time
   // Throw the die and count the frequencies
   for (int i = 0; i < TOTAL_COUNT; ++i) {
      ++frequencies[rand() % 6];
   }

   // Print statistics
   cout << fixed << setprecision(2);
   for (int i = 0; i < NUM_FACES; i++) {
      cout << i+1 << ": " << frequencies[i]
           << " (" << 100.0 * frequencies[i] / TOTAL_COUNT << "%)" << endl;
   }
}