...
    cout << "Enter the amount of the loan: $";
    cin >> initLoan;
    newLoan = initLoan;
    cout << "Enter the interest amount: %";
    cin >> initInterest;
    newInterest = initInterest;
    monthlyInterest = newInterest*0.01 / 12;
    cout << "Enter the monthly payment: $";
    cin >> initMonthly;
 
    while (newLoan >= 0) {
        principal = initMonthly - newLoan*monthlyInterest;
        newLoan = newLoan - principal;
        monthCount++;
    }
...