//
// Filename:      pgm2_3d.cpp
//
// Description:   Demonstration of a while statement to collect a sequence
//                of input data from the user. With valid data checking.
//                Use of nested while loops is demonstrated. The user
//                decides when no more data is available.
//
// ENSC 104:      Digital Computer Programming
//
// Instructor:    Dr. Walsh
//
// Section:       2
//
// Date Created:  01/29/98
// Last Modified: 02/14/98
//
// Name:          N/A
//

#include <iostream.h>

main()
   {
   int score;
   int total = 0;
   int count = 0;

   cout << "Enter an exam score(-1 to END): ";
   cin >> score;

   while( score != -1 )
      {
      while ( score < 0 || score > 100 )
         {
         cout << "***** INVALID EXAM SCORE *****" << endl;
         cout << "Enter an exam score: ";
         cin >> score;
         }
      total = total + score;
      count = count + 1;

      cout << "Enter an exam score(-1 to END): ";
      cin >> score;
      }
   

   if ( count > 0 )
      {
      cout << "The average score is " << total/count << endl;
      cout << "\n\nYou entered " << count << " scores\n";
      }
   else
      {
      cout << "\nNo scores were entered!!\n";
      }
   

   return 0;
   }