Perform Bank Account Authentication using Friends Concept ( Global class)

Scenario :- 
                Three classes has been defined SAVING_ACCOUNT ( BANK SAVING 

ACCOUNT ), ACCOUNT_HOLDER  (SAVING ACCOUNT OWNER) , OTHER_PERSON ( NON ACCOUNT HOLDER) .Both account holder & other person class inherit from Saving Account class. Saving Account  Class  Define itself friend of Account holder so This Will Allow Account Holder To Access Private data of Saving account Class .

Perform Friends Operation For above example using Global Class.

Procedure :-

Step 1. Go To Tcode SE24 . Create Class For Account Holder . & Provide Display 
           Amount Method.
         


Step 2. Do Implementation in Methods & Save , Activate



Step 2. Create Class For Saving Account & Provide Account Holder Class name 
            in Friends.



Step 4. Provide Deposit ,Withdraw & Display Methods in Account Class . Keep
            Visibility of Withdrawal amount is Private .
           


Step 5. Do Implementation For Each Methods.











 
Step 6. Go To Attributes .Provide Attributes For Deposit & Withdraw . & Save  
           and Activate.




Step 7. Create Class For Other Person  & Provide Display amount Method.



Step 8. Do Implementation For Method . Check the Code It Will Give Error .



Error is because . other person Don't have permission to withdraw money from account due To ZCL_OTH Class is not friend of account class .Visibility of Withdrawal is Private .Now Comment display Withdrawal method .  Save , Check & Activate



Step 9. Go To Account Class ( ZCL_ACH) . Execute Class



Step 10. Execute Method Display_ACC



Step 11. Create Program For Account Class & Execute .



Step 12 . Output.