Reference no: EM131447100

Who can figure out this Exercise for me

(Bank Account Inheritance Hierarchy) Create an inheritance hierarchy that a bank might use to represent customers' bank accounts. All customers at this bank can deposit (i.e., credit) money into their accounts and withdraw (i.e., debit) money from their accounts. More specific types of accounts also exist. Savings accounts, for instance, earn interest on the money they hold. Checking accounts, on the other hand, charge a fee per transaction.

Create base class BankAccount and derived classes SavingsAccount and CheckingAccount that inherit from class BankAccount. Base class BankAccount should include one private instance variable of type decimal to represent the account balance. The class should provide a constructor that receives an initial balance and uses it to initialize the instance variable with a public property. The property should validate the initial balance to ensure that it's greater than or equal to 0.0; if not, throw an exception. The class should provide two public methods. Method Deposit should add an amount to the current balance. Method Withdraw should withdraw money from the Account and ensure that the debit amount does not exceed the Account's balance. If it does, the balance should be left unchanged, and the method should display the message "Debit amount exceeded account balance."

Derived class SavingsAccount should inherit the functionality of BankAccount, but also include a decimal instance variable indicating the interest rate (percentage) assigned to the Account. SavingsAccount's constructor should receive the initial balance, as well as an initial value for the interest rate. SavingsAccount should provide public method CalculateInterest that returns a decimal indicating the amount of interest earned by an account. Method CalculateInterest should determine this amount by multiplying the interest rate by the account balance. [Note: SavingsAccount should inherit methods Deposit and Withdraw without redefining them.]

Derived class CheckingAccount should inherit from base class BankAccount and include a decimal instance variable that represents the fee charged per transaction. CheckingAccount's constructor should receive the initial balance, as well as a parameter indicating a fee amount. Class CheckingAccount should redefine methods Deposit and Withdraw so that they subtract the fee from the account balance whenever either transaction is performed successfully. CheckingAccount's versions of these methods should invoke the base-class Account version to perform the updates to an account balance. CheckingAccount's Withdraw method should charge a fee only if money is actually withdrawn (i.e., the debit amount does not exceed the account balance). [Hint: Define BankAccount's Withdraw method so that it returns a bool indicating whether money was withdrawn. Then use the return value to determine whether a fee should be charged.]

After defining the classes in this hierarchy, write an app that creates objects of each class and tests their methods. Add interest to the SavingsAccount object by first invoking its CalculateIn- terest method, then passing the returned interest amount to the object's Deposit method.