+) Add - ) Subtract X) Exit If + or - is entered the screen should clear and the user should be prompted to enter a second number. See Menu 2 above. If a second number was entered the calculated...

+) Add

- ) Subtract

X) Exit

• If + or - is entered the screen should clear and the user should be prompted to enter a second number. See Menu 2 above.


• If a second number was entered the calculated result should be displayed on the screen.


• After three seconds the screen should clear and Menu 1 should be displayed again.