Chapter 4, Problem 6P

Write a function declaration for a function that computes interest on a credit card account balance. The function takes arguments for the initial balance, the monthly interest rate, and the number of months for which interest must be paid. The value returned is the interest due. Do not forget to compound the interest—that is to charge interest on the interest due. The interest due is added into the balance due and the interest for the next month is computed using this larger balance. Use a while loop that is similar to (but need not be identical to) the one shown in Display 2.14. Embed the function in a program that reads the values for the interest rate, initial account balance, and number of months, then outputs the interest due. Embed your function definition in a program that lets the user compute interest due on a credit account balance. The program should allow the user to repeat the calculation until the user says he or she wants to end the program.