MATLAB Object-Oriented Programming

end

newbal = BA.AccountBalance - amt;

BA.AccountBalance = newbal;

if newbal < 0

notify(BA,'InsufficientFunds')

end

end

function getStatement(BA)

disp('-------------------------')

disp(['Account: ',num2str(BA.AccountNumber)])

ab = sprintf('%0.2f',BA.AccountBalance);

disp(['CurrentBalance: ',ab])

disp(['Account Status: ',BA.AccountStatus])

disp('-------------------------')

end

end

methods (Static)

function obj = loadobj(s)

if isstruct(s)

accNum = s.AccountNumber;

initBal = s.AccountBalance;

obj = BankAccount(accNum,initBal);

else

obj.AccountListener = AccountManager.addAccount(s);

end

end

end

end

Formulating the AccountManager Class

The purpose of the AccountManager class is to provide services to accounts. For the

BankAccount class, the AccountManager class listens for withdrawals that cause the

balance to drop into the negative range. When the BankAccount object triggers the

InsufficientsFunds event, the AccountManager resets the account status.

The AccountManager class stores no data so it does not need properties. The

BankAccount object stores the handle of the listener object.

The AccountManager performs two operations:

• Assign a status to each account as a result of a withdrawal


• Adds an account to the system by monitoring account balances.

Class Components

The AccountManager class implements two methods:

3 MATLAB Classes Overview