EX7.3.py

# 7.3 (The Account class) Design a class named Account that contains:
# ■ A private int data field named id for the account.
# ■ A private float data field named balance for the account.
# ■ A private float data field named annualInterestRate that stores the current
# interest rate.
# ■ A constructor that creates an account with the specified id (default 0), initial
# balance (default 100), and annual interest rate (default 0).
# ■ The accessor and mutator methods for id, balance, and annualInterestRate.
# ■ A method named getMonthlyInterestRate() that returns the monthly
# interest rate.
# ■ A method named getMonthlyInterest() that returns the monthly interest.
# ■ A method named withdraw that withdraws a specified amount from the
# account.
# ■ A method named deposit that deposits a specified amount to the account.
# Draw the UML diagram for the class, and then implement the class. (Hint: The
# method getMonthlyInterest() is to return the monthly interest amount, not
# the interest rate. Use this formula to calculate the monthly interest: balance *
# monthlyInterestRate. monthlyInterestRate is annualInterestRate
# / 12. Note that annualInterestRate is a percent (like 4.5%). You need to
# divide it by 100.)
# Write a test program that creates an Account object with an account id of 1122, a
# balance of $20,000, and an annual interest rate of 4.5%. Use the withdraw
# method to withdraw $2,500, use the deposit method to deposit $3,000, and print
# the id, balance, monthly interest rate, and monthly interest.
from CH7.Account import Account


def main():
    acc = Account(1122, 20000, 4.5)
    acc.withdraw(2500)
    getAccountInfo(acc)
    print()
    acc.deposit(3000)
    getAccountInfo(acc)


def getAccountInfo(acc):
    id = acc.getId()
    bal = acc.getBalance()
    mir = acc.getMonthlyInterestRate()
    mi = acc.getMonthlyInterest()
    print("Account ID:", id, "\nBalance:", bal,
          "\nMonthly IR:", mir, "\nMonthly interest:", mi)


main()