Thread: Using an Array to store the count.

If you have grades 1->5 then you could create an integer array with five elements, and increment it for each grade -

int grades[5]={0};
int grade;
cin >> grade;
grades[grade-1]++;
//repeat for all students

Here is a simple method using an if / else if/ else structure for checking the grade value as it is entered.

Code:

#include <iostream.h>

int main()
{
    int num_students  = 0;
    int grade = 0;
    int grade_scale[5] = {0}  // A, B, C, D, F
    char letter_grade[5] = {'A', 'B', 'C', 'D', 'F'};

    cin >> num_students;

    for ( int i = 0; i < num_students; i++)
    {
        cin >> grade;

        if ( grade > 89 )
            ++grade_scale[0];  // add an A
        else if ( grade > 79)
            ++grade_scale[1];  // add a B
        else if ( grade > 79)
            ++grade_scale[2];  // add a C
        else if ( grade > 79)
            ++grade_scale[3];  // add a D
        else
            ++grade_scale[4];  // add an F
    } // end for loop

    for ( i = 0; i < 5; i++)
        cout << letter_grade[i] << ":  " << grade_scale[i] << endl;

    return 0;
} // end main

David