Question

Write a C++ program to implement this task.

Students are registered in 3 courses in a semester. To pass each course, students have to make a grade greater than or equal to 40. You have to write a program to determine if the student will pass or fail the semester, based on the following criteria:

A student passes if all three courses are passed. Additionally, a student may pass if only one subject is failed, and the overall average grade for the 3 courses is greater than or equal to 50.

Your program should prompt the user to enter grades for the three courses. Make use of a named constant for defining the pass mark of 40.

SAMPLE RUN 1

Enter the 3 grades, separated by a space:

75 85 90

You entered:
Grade_1 = 75
Grade_2 = 85
Grade_3 = 90

Average Grade: 83.3333 You Passed :-)

Answer 1

#include <iostream>

using namespace std;

#define FAIL_SCORE 40
#define AVG_FAIL_SCORE 50

int main() {
    double n1, n2, n3;
    cout << "Enter the 3 grades, separated by a space:" << endl;
    cin >> n1 >> n2 >> n3;

    cout << "You entered:" << endl;
    cout << "Grade_1 = " << n1 << endl;
    cout << "Grade_2 = " << n2 << endl;
    cout << "Grade_3 = " << n3 << endl;

    double avg = (n1+n2+n3) / 3;
    cout << "Average Grade: " << avg;

    int fail_count = 0;
    if (n1 < FAIL_SCORE) ++fail_count;
    if (n2 < FAIL_SCORE) ++fail_count;
    if (n3 < FAIL_SCORE) ++fail_count;

    if (fail_count > 1 || (fail_count == 1 && avg < FAIL_SCORE)) {
        cout << " You Failed :-(" << endl;
    } else {
        cout << " You Passed :-)" << endl;
    }
    return 0;
}