Computer Programming Concepts and Visual Basic David I. Schneider

382 Computer Programming Concepts and Visual Basic
FIGURE 12-4 Bank Accounts
The program should use two classes, CTransaction and CAccount. The class CTransaction
should have properties for transaction type, amount, paid to, previous balance, new balance,
and transaction date. It should have a method that puts the data into a string that can be added
to the Transaction list box, and methods that place data into and retrieve data from a sequential
file.
The class CAccount, which will have both a checking account and a savings account as instances,
should contain a collection of CTransaction objects. In addition, it should have properties
for name (Checking or Savings) and balance. It should have methods to carry out a
transaction (if possible), display the list of transactions, and to load and retrieve the set of
transactions into or from a sequential file. The events InsufficientFunds and
TransactionCommitted should be triggered at appropriate times. [Hint: In order to make
CAccount object to display a list of transactions, a list box should be passed to a method as
an argument. The method might begin with Public Sub EnumerateTransactions(LB As
ListBox).]