// This program determines whether test scores are passing marks.
    #include <iostream>
    using namespace std;

    int main()
    {
        const unsigned int PASSING_SCORE = 60;
        int score;

        cout << "Enter a test scrore and I will tell you if it is a passing mark." << endl;
        cout << "Enter -1 to quit: ";
        cin >> score;

        while (score != -1)
        {
            if (score >= PASSING_SCORE)
            {
                cout <<  score << ": PASS" << endl;
            }
            else
            {
                cout <<  score << ": FAIL" << endl;
            }

            cout << "Enter a test scrore and I will tell you if it is a passing mark." << endl;
            cout << "Enter -1 to quit: ";
            cin >> score;
        }

        return 0;
    }