In main$(),$ create program that has the user enter two values ask if the user wants to perform an operation $($add$,$ subtract, multiply or divide$).$ Create a function$/$method for each operation. Call the the appropriate functions based on the operation chosen by user, perform the operation, and output the result as appropriate.

Include appropriate error checking the prevents division if the user enters $0$ for the second number; also divide the larger number by the smaller number.