MATLAB Object-Oriented Programming

BankAccount Class Discussion

function BA = BankAccount(AccountNumber,InitialBalance)

BA.AccountNumber = AccountNumber;

BA.AccountBalance = InitialBalance;

BA.AccountListener = AccountManager.addAccount(BA);

end

Constructor initializes property values

with input arguments.

AccountManager.addAccount is static

method of AccountManager class.

Creates listener for

InsufficientFunds event and stores

listener handle in AccountListener

property.

function deposit(BA,amt)

BA.AccountBalance = BA.AccountBalance + amt;

if BA.AccountBalance > 0

BA.AccountStatus = 'open';

end

end

deposit adjusts value of

AccountBalance property.

If AccountStatus is closed and

subsequent deposit brings

AccountBalance into positive range,

then AccountStatus is reset to open.

function withdraw(BA,amt)

if (strcmp(BA.AccountStatus,'closed')&& ...

BA.AccountBalance < 0)

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

' has been closed.'])

return

end

newbal = BA.AccountBalance - amt;

BA.AccountBalance = newbal;

if newbal < 0

notify(BA,'InsufficientFunds')

end

end

Updates AccountBalance property. If

value of account balance is negative as a

result of the withdrawal, notify

triggers InsufficentFunds event.

For more information on listeners, see

“Events and Listeners Syntax” on page

11-22.

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

Display selected information about the

account.

end

methods (Static)

End of ordinary methods block.

Beginning of static methods block. See

“Static Methods” on page 9-32

3 MATLAB Classes Overview