reflection

The last code danpost posted creates that. It was to check if the methods which are changing the balance are working as intended and they seem to do. So you can just comment it out or remove it (change it back to it was before).

so danpost, super_hippo is there anywhere in both of my program that i can get the 120 when I entered id no. 2

Enter id 2; withdraw 30; deposit 100; exit; enter another id; exit; enter id 2; get balance. The instructions just gave you an example. It does not mean you need to end up with that amount. They just want that whatever actions you do throughout the running of the program, the balances stay accurate for each account.