Photo AI
The MidCity Shopping Centre sells gift vouchers that can be used at any shop in the shopping centre - NSC Information Technology - Question 3 - 2021 - Paper 1
Question 3
The MidCity Shopping Centre sells gift vouchers that can be used at any shop in the shopping centre. The minimum amount available per gift voucher card is R50 and th... show full transcript
Worked Solution & Example Answer:The MidCity Shopping Centre sells gift vouchers that can be used at any shop in the shopping centre - NSC Information Technology - Question 3 - 2021 - Paper 1
Step 1
3.1 - Purchase gift voucher
Answer
- Extract the gift voucher number from the component
edt03_VoucherNum. - Extract the name of the customer from the component
edt03_2_1. - Extract the amount from the component
cmb03_2_1. - Instantiate a new
objGiftVoucherobject using the extracted values:objGiftVoucher = new GiftVoucher(voucherNumber, customerName, amount); - Display the details of the gift voucher using
toStringmethod in the output areared03_2_1:red03_2_1.setText(objGiftVoucher.toString());
Step 2
3.2.2 - Button [Display balance]
Answer
-
Retrieve the gift voucher number from
edt03_VoucherNum. -
Check if the gift voucher number matches the existing voucher's number:
if (objGiftVoucher.getVoucherNumber() == enteredVoucherNum) { -
Use the
getBalancemethod to retrieve and display the balance in panelpnl03_2_2:double balance = objGiftVoucher.getBalance(); pnl03_2_2.setText(String.format("Balance: %.2f", balance)); -
Enable the button
btn03_2_2_bfor further actions. -
Button [Use gift voucher]:
- Extract the purchase amount from the edit box and convert it to the appropriate data type.
- Check if the voucher is sufficient using:
if (objGiftVoucher.isSufficient(purchaseAmount)) { - If sufficient, call
updateBalance(purchaseAmount)and display success message:objGiftVoucher.updateBalance(purchaseAmount); lblMessage.setText("Voucher successfully used"); - If insufficient, calculate and display the outstanding amount and show a message accordingly.