/*
   testarr07.cpp
   CIS 150
   06/19/2008
   David Klick

   Using an array as a set of accumulators. This program
   sums up the results of die rolls.
*/

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

void cont();

int main() {
   int i;
   int die;
   int rolls[7]; // array to hold results of rolls
                 // array has one extra element because we want
                 //    roll[1] through roll[6], but all arrays
                 //    start with index 0

   // initialize random number generator
   srand(time(0));

   // initialize array to 0s (the elements are accumulators)
   for (i=0; i<7; i++) {
      rolls[i] = 0;
   }
   
   // generate 100 rolls and tally them
   for (i=0; i<100; i++) {
      die = rand() % 6 + 1;   // simulate die roll
      rolls[die]++;           // add 1 to the corresponding accumulator
   }
   
   // display results
   for (i=1; i<7; i++) {
      cout << i << ": " << setw(2) << rolls[i] << '\n';
   }
   
   cont();
   return 0;
}

/*
   void cont();
   
   Arguments: none
   
   Returns: nothing
   
   Clears input buffer and pauses waiting for user 
   to press Enter.
*/
void cont() {
   if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
   cout << "Press enter to continue...";
   cin.get();
}

/*
   Sample output:

   1: 19
   2: 10
   3: 20
   4: 12
   5: 19
   6: 20
*/