// RollDice.cc
// Program to simulate rolling a die with 6 faces N times.
// Output is generated by random number generator and converted to range.
// Fraction of times the number 6 appears is calculated.

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

int RollDie();

int main()
{
   int outcome, N=0, count_six=0, count_other=0;
   float fraction_six, fraction_other;

    // Initialise random number generator with value of system time.
    srandom(time(NULL));

    // Get user input in correct range.
    while(N<1 || N>1000)
    {
       cout << "Input the number of experiments (1-1000): ";
       cin >> N;
    }

    // Perform N experiments. 
    // Call RollDie() N times and record number of sixes.
    for(int i=0; i< N; i++)
    {
       outcome = RollDie();
       cout << outcome << endl;
       if(outcome==6) count_six++;
       else count_other++;
    }

    //Integer variables must be converted (cast) for correct division
    fraction_six = static_cast<float>(count_six)/N;
    fraction_other = static_cast<float>(count_other)/N;

    // Output results
    cout << "Proportion of outcomes in which 6 was rolled " 
         << fraction_six << endl;
    cout << "Proportion of outcomes in which other numbers were rolled " 
         << fraction_other << endl;
    return 0;
}


// Function to simulate rolling a single 6-sided die. 
// Each call will randomly return a different integer between 1 and 6.

int RollDie() 
{
   int randomNumber, die;

   randomNumber = random();
   die = 1 + randomNumber % 6;
   return die;
}