1. Take two parameters: amount the customer withdraws, and the amount the customer deposits.
2. Set the initial balance of bank account.
3. Add the deposit amount to the current balance.
4. Deduct the withdrawal amount to the current balance.
5. Return the updated current balance (Note: Each time when function is called, the current balance should be the updates from the previous balance.)
6. If the withdrawal amount is greater than the current balance, displays some warning message and displays the available balance
7. USE C++