Bank Account Application $-$ Programming Exercises

Inheritance:

The bank has two types of bank accounts, one is called a saving account and the other is called a checking account. Both accounts have the basic information of class Account such as$,$ clinet and balance, as well as class Account methods. In addition, each account type has the following new rules. Extend class Account to include the new features of each account.

Checking account is for customers who wish to receive their salaries direct to their account. The account stores the salary amount, allowing customers to withdraw money even if their balance is not sufficient up to an amount equal to half the salary.

Fields

Account holder salary: salary, type int

Methods

Override constructor with new fields

setSalary $($int$),$ it must be greater than zero.

getSalary $(),$ returns int.

withdraw $(),$ override from class Account. This method allows for overdraft withdraw for an amount of half the customer's salary.

tostring $(),$ override from class Account to return the customer's info and balance in addition to the customer's salary.

Saving account is for customers who wish to receive interest on their saving balances. The account has a minimum balance to be eligible for interest. A balance below the minimum amount is charged a certain amount as a service fee. The minimum balance and fees are the same for all customers. The interest rate can vary from customer to customer.

Fields

Interest rate: rate, type double

Minimum balance: $($static$)$ base, type int

Service fees: $($static$)$ fees, type int

Methods

Override constructor with new fields

setRate$($double$),$ must be between $0$ and $1$

getRate $(),$ returns double

setBase$($int$)$

getBase$(),$ returns int

setFees $($int$)$

getFees$(),$ returns int

calculateInterest$()$

Implementation: The method calculates the interest by multiplying the rate by the balance and adding the product to the balance. Before calculating the interest, the program must check if the balance is eligible or not. If not, then a message is displayed stating that the balance is below the base amount.

withdraw $(),$ override from class Account. This method charges fees if withdraw amount causes a balance to be less than a base amount. The fees is subtracted from the balance $($balance can be negative$)$ and a statement must display the new balance after charges.

toString $(),$ override from class Account to return the customer's info, and balance in addition to the customer's rate.

Testing:

For testing, in main, create a menu to show options such as withdraw, deposit to customers, in addition to calculate interest for saving accounts. The menu should be inside a while loop to allow a customer to withdraw or deposit multiple times until they select quit from the menu. It is optional to create one menu or two separate menus for each account type.