C++ Class

#Class, Inheritance, polymorphism and STL

1. (15 points). Implement a class called BankAccount.

The class should have the following member variables:

account_number - int

balance – a double that holds the balance on the account

transcations – a vector of double includes all transactions, including deposit (a positive value), withdraw (a negative value) and monthly interest (a positive value).

The class should have 3 constructors (a default constructor, a copy constructor), accessors and mutators functions, a function to return the number of accounts, and deposit and withdraw functions.

a) UML diagram

b) implement the BankAccount.h file.

c) implement the BankAccount.cpp file.

2. (20 points) Consider a class SavingsAccount that is derived from the BankAccount class. The derived SavingsAccount class has an additional member, monthInterestRate, which holds the monthly interest rate for the account. The class has a constructor (calling the base class’s constructor) and a calcInterest function that returns the monthly interest on the account.

a) implement the SavingsAccount.h file

b) implement the SavingsAccount.cpp file

c) Write a main () function that:

· Declares a pointer of BankAccount to refer to an array of 5 SavingsAccount objects.

· Assigns values to the member variables using the mutator functions.

· Print the number of accounts that have been created (call the function you implemented above)

· Prints out the account number and balance of each element of the array using the accessor functions.

· Print the account with the maximal balance.

3. (15 points)

a) define a pure virtual function transfer in the BankAccount class (the question #1), can you still instantiate the BankAccount after adding the pure virtual function? Explain your answer?

void transfer (BankAccount &DestAcc, double transferAmount)

b) implement a transfer function in SavingAccount class to override the above virtual function,

The function should transfer transferAmount from the source account to destAcc.