ADT for ProcessBankAccount

	Members:


   private BankAccount []
   private int n  
   private FileWriter error

	Methods:

Constructor:
PRECONDITIONS:  none
INPUT:		none
PROCESS:	none
OUTPUT:		none
POSTCONDITIONS: none

readArray
PRECONDITIONS:  file must exist and be able to be opened.
INPUT:		String, name of file to be opened.
PROCESS:	It opens the file given. It reads in the first element, which
		tells how many elements follow (and the size of the array of
		BankAccounts). It creates the array of BankAccount of size n.
		It then reads in the n elements and populates the array.
OUTPUT:		none
POSTCONDITIONS:	The array of BankAccount is created and populated. The value of
		n is assigned.

printArray
PRECONDITIONS:  The array must have been created.
INPUT:		none
PROCESS:	It prints out the n elements of the BankAccount to the
		terminal window.
OUTPUT:		none
POSTCONDITIONS:	none

processArray
PRECONDITIONS:  The file must exist and be able to be opened.
INPUT:		String, the name of the input file.
PROCESS:	This first opens the input file and opens via append the error
		file.  It reads in one transaction at a time until the input
		file is empty (no more data).  It processes each transaction.
		The output of each transaction is sent to the terminal window
		including the new balance of the accounts involved in the
		transactions.  If a transaction can not be processed, it will 
		also report the transaction and the error to the error file.
OUTPUT:		String
POSTCONDITIONS:	The BankAccounts and error file are changed.

overdrawn
PRECONDITIONS:  none
INPUT:		none
PROCESS:	It prints out all of the accounts which have a negative 
		balance.
OUTPUT:		none
POSTCONDITIONS:	none

getArraySize
PRECONDITIONS:  none
INPUT:		none
PROCESS:	It returns n, the size of the array.
OUTPUT:		int
POSTCONDITIONS:	none

getBankAccounts
PRECONDITIONS:  none
INPUT:		none
PROCESS:	It returns the array of BankAcounts.
OUTPUT:		BankAccount [ ]
POSTCONDITIONS:	none