elevator help

[iop]

using the fromTopToMiddle procedure if a person clicks on the middle button while the elevator is at the top, I want the elevator to go down to the middle. how can i do this?

Quote:

var x, y, b : int

proc fromTopToMiddle
drawfillbox (maxx div 2 - 22, 3, maxx div 2 + 22, 197, white)
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, red)
for decreasing up : 150 .. 80
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, white)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, red)
delay (10)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, white)
end for
drawfillbox (maxx div 2 - 20, 195, maxx div 2 + 20, 155, red)
end fromTopToMiddle

proc fromMiddleToTop
drawfillbox (maxx div 2 - 22, 3, maxx div 2 + 22, 197, white)
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, red)
for up : 80 .. 150
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, white)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, red)
delay (10)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, white)
end for
drawfillbox (maxx div 2 - 20, 195, maxx div 2 + 20, 155, red)
end fromMiddleToTop

proc fromGroundToMiddle
drawfillbox (maxx div 2 - 22, 3, maxx div 2 + 22, 197, white)
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, red)
for up : 0 .. 80
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, white)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, red)
delay (10)
drawfillbox (maxx div 2 - 20, 5 + up + 40, maxx div 2 + 20, 5 + up, white)
end for
drawfillbox (maxx div 2 - 20, 125, maxx div 2 + 20, 85, red)
end fromGroundToMiddle

for drawing : 23 .. 25
drawline (maxx div 2 - drawing, 0, maxx div 2 + drawing, 0, black)
drawline (maxx div 2 - drawing, 1, maxx div 2 + drawing, 1, black)
drawline (maxx div 2 - drawing, 2, maxx div 2 + drawing, 2, black)
drawline (maxx div 2 - drawing, 0, maxx div 2 - drawing, 200, black)
drawline (maxx div 2 - drawing, 0, maxx div 2 - drawing, 200, black)
drawline (maxx div 2 - drawing, 0, maxx div 2 - drawing, 200, black)
drawline (maxx div 2 + drawing, 0, maxx div 2 + drawing, 200, black)
drawline (maxx div 2 + drawing, 0, maxx div 2 + drawing, 200, black)
drawline (maxx div 2 + drawing, 0, maxx div 2 + drawing, 200, black)
drawline (maxx div 2 - drawing, 198, maxx div 2 + drawing, 198, black)
drawline (maxx div 2 - drawing, 199, maxx div 2 + drawing, 199, black)
drawline (maxx div 2 - drawing, 200, maxx div 2 + drawing, 200, black)
end for
drawfillbox (maxx div 2 - 20, 45, maxx div 2 + 20, 5, red)
drawfillbox (390, 160, 400, 170, blue)
locate (14, 45)
put "Call button."
drawfillbox (390, 98, 400, 108, blue)
locate (18, 45)
put "Call button."
drawfillbox (maxx - 10, 10, maxx - 40, 40, black)
locate (22, 76)
put "Exit"

loop
mousewhere (x, y, b)
if x >= 390 and x <= 400 and y >= 98 and y <= 108 and b = 1 then
fromGroundToMiddle
elsif x >= 390 and x <= 400 and y >= 160 and y <= 170 and b = 1 then
fromMiddleToTop
end if
exit when x >= maxx - 40 and x <= maxx - 10 and y >= 10 and y <= 40 and b = 1
end loop

[AsianSensation]

you need to have a variable to keep track of your current position. Something like this could help:

code:

var pos : string proc fromTopToMiddle         ...         pos := "Middle" end fromTopToMiddle proc fromMiddleToTop         ...         pos := "Top" end fromMiddleToTop proc fromGroundToMiddle         ...         pos := "Middle" end fromGroundToMiddle

and when you are using your if statements, you have to check to see the current position of your elevator. Then depends on the position, you call the needed procedure.