Adding borders to turingoutput screens.

[toolazy12]

What is it you are trying to achieve?
I need to add a border to a turing program screen. Theres a rectangle, and you can move it with arrow keys. however, its possible to move the square out of theoutput screen. I have no idea how to set up the borders

Describe what you have tried to solve this problem
I've tried to put up an if structure but it hasn't been any helps..


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)
I'm really sorry its so long, I dont know how to attach a code..

Turing:

<%declaration section var startpointx, startpointy : int := 0 var endpointx, endpointy : int := 50 var key : string (1) %set screen mode and size setscreen ("graphics:400;400") setscreen ("noecho") setscreen ("nocursor") setscreen ("offscreenonly") procedure display     drawfillbox (startpointx, startpointy, endpointx, endpointy, white)     drawfillbox (startpointx + 1, startpointy + 1, endpointx - 1, endpointy - 1, blue)     getch (key)     if key = chr (200) then         startpointy := startpointy + 1         endpointy := endpointy + 1     elsif key = chr (208) then         startpointy := startpointy - 1         endpointy := endpointy - 1     elsif key = chr (205) then         startpointx := startpointx + 1         endpointx := endpointx + 1     else         if key = chr (203) then             startpointx := startpointx - 1             endpointx := endpointx - 1         else             if (startpointx = 0 or startpointx = 350) and (startpointy = 0 or startpointy = 350) and (endpointx = 399 or endpointy = 0) and (endpointy = 399 or endpointy = 0) then                 startpointx := startpointx-1                 startpointy := startpointy-1                 endpointy := endpointy-1                 endpointx := endpointx-1             end if         end if     end if     View.Update end display %main program loop     display     exit when key = chr (27) end loop >

Please specify what version of Turing you are using
The most recent..

[Raknarg]

Turing:

if x >= maxx then      x = maxx elsif x <= 0 then      x = 0 end if if y >= maxy then      y = maxy elsif y <= 0 then      y = 0 end if

You could do something like that.

[goroyoshi]

actually, there is a different way to do it in less lines, and its the proper way to do it, im in their class

Turing:

if key = chr (200) and endpointY < maxy then     %insert movement here end if

just do that with all 4 movements

[toolazy12]

in my class?
and thanks a lot