/*
   testfunc06.cpp
   CIS 150
   6/9/2005
   David Klick
   
   This program demonstrates how to create
   a die rolling simulator that rolls two dice
   at a time (useful for games like craps).
*/

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <ctime>
using std::cout;
using std::cin;

int roll();    // function prototype 
int roll2();   // function prototype 

int main(void) {
   int numrolls;  // how many times to roll the die
   int i;         // loop counter

   // initialize random number generator
   srand(time(NULL));
   
   // find out how many rolls the user wants
   cout << "How many rolls? (0 - 100) ";
   cin >> numrolls;
   
   // end program if user entered something invalid
   if (numrolls<0 || numrolls>100) {
      cout << "Error: Invalid number of rolls\n";
      return(1);
   }
   
   // generate and display rolls of dice
   for (i=0; i<numrolls; i++) {
      cout << roll2() << " ";
   }
   
   cout << "\nNormal program termination.\n";
   return 0;
}

/*
   This function generates a simulated random roll
   of a die.
*/
int roll() {
   int facevalue = rand() % 6 + 1;
   return facevalue;
}

/*
   This function generates a simulated random roll
   of two dice at once. This is NOT the same as
   generating a random number between 2 and 12 since
   the distribution of the generated numbers is
   different.
*/
int roll2() {
   return roll() + roll();
}