vThe radio buttons
and the text box of the GUI are the means of presenting input
vThe computation
takes place when the OK
is clicked
vSince clicking a
radio button, entering the text box and clicking the OK command button are
“events”, the program can be developed by considering what computation is
needed in response to each event
;Month Radio Button -- set up
the data for that month
;Day Value Entry -- save the
data for later
;OK Command Button -- Determine
the sign and print it
vHow is the sign
determined from the month and day?