Introduction to Programming: Additional work for week 17

Perhaps also try introducing another type of bank account. The bank programs given all store bank accounts of only two types: AccountB and DepositAccountB which is a subtype of AccountB. Try introducing another type of bank account which will have to be another subtype of AccountB, for example a type OverdraftAccount, a sort of account which is allowed to go overdrawn to a particular limit. The front-end program (UseBank1.java and so on) will need modifying so there is an additional command which can be used to change an OverdraftAccount's overdraft limit. You might also want to arrange for interest to be taken from overdrawn accounts when the update command is called.

In the lecture where we went over the previous test, we covered in particular issues involving the type String and related types, which a lot of people had problems with in the test. Here are some notes from the web on strings and characters:

• Sylvia Sorkin, Community College of Baltimore County, Maryland
• Sebastian Hunt, City University, London
• Jeff Rohl, University of Western Australia