// MAINTENANCE12 // This program creates a screen with two textboxes and a button.

// When the user clicks the button, a label displays the result

// which is the sum of the numbers in the two textboxes.

// Modify the program to allow the user to click any

// of three buttons. On displays the sum of the two numbers.

// The others display the difference and product respectively.

start

Declarations

Screen screen1

Button calcButton

Textbox usersEntry1

Textbox usersEntry2

Label result

screen1.setSize(200, 200)

calcButton.setText("Click to sum the numbers you have entered")

calcButton.registerListener(sumNumbers())

productButton.setText(Click to multiply the numbers you have entered)

productButton.registerListener(multiplyNumbers())

screen1.add(usersEntry1)

screen1.add(usersEntry2)

screen1.add(calcButton)

screen1.add(differenceButton)

screen1.add(productButton)

stop

sumNumbers()

Declarations

Label result

num sum

string answer

sum = usersEntry1.getText() + usersEntry2.getText()

answer = "The sum of the numbers is ", sum

result.setText(answer)

screen1.add(result)

return