/*-----
  Contract: main: void -> int

  Purpose: interactively ask the user for 5 grades, and 
           average them, printing the averaged result 
           to the screen
  
  Examples: when called, if the user types in 
            100, 90, 80, 87, 92.5 when
            prompted, then it will print to the screen:
The average of those 5 grades is: 89.9

  by: Sharon M. Tuttle
  last modified: 4-11-10
-----*/

#include <iostream>
using namespace std;

int main()
{
    /* set up the needed local variables and constant */

    double latest_grade;
    double sum_grades = 0;
    int count = 0;
    const int NUM_GRADES = 5;

    /* read in and add up the grades */

    while (count < NUM_GRADES)
    {
        cout << "Please enter a grade: ";
        cin>> latest_grade;

        sum_grades = sum_grades + latest_grade;
        count++;
    }

    /* compute and output the average */

    cout << "The average of the " << NUM_GRADES 
         << " grades is: " << sum_grades / NUM_GRADES
         << endl;

    return EXIT_SUCCESS;
}