/* Program to process exam grades - more modular version */
#include <iostream>
#include <fstream>
#include <cstdlib>          //needed to use exit() function
using namespace std;

const int SIZE = 50;

int main()
{
    int num,sum=0;
    int mark[SIZE];
    double avgmark;

    //un-comment to redirect cin to a file
    //ifstream cin("c:\\bc\\CISC1110\\pgms\\chapter7\\myinput.txt");

    cout << "Enter the number of marks: ";
    cin >> num;

    if (num > 0 && num <= SIZE)
        cout << endl << "There are " << num << " marks" << endl << endl;
    else
    {
        cout << "Invalid number of marks" << endl;
//      system("pause");    //un-comment when using DevC++
        exit(1);
    }

    // enter marks and print them
    for (int count = 0; count < num; count++)
    {
        cout << "Enter a mark: ";
        cin >> mark[count];
        cout << "mark[" << count << "]=" << mark[count] << endl;
    }

    // find the average mark
    for (int count = 0; count < num; count++)
        sum += mark[count];
    avgmark = (double)sum/num;
    cout << endl << "The average is " << avgmark << endl;

//  system("pause");    //un-comment when using DevC++
    return 0;
}