Using arrow keys?How?

[KONjbnj]

How do i for example use the arrow keys to move a dot on the screen. Im a noob so ......

[StarGateSG-1]

Use Input Ky Down look it up!

[syphon4]

here is a simple program to move a crosshair i created...........learn from it

View.Set ("graphics:640;480,offscreenonly")

var horizontal, vertical : int := 25
var keyinput : string (1) := "x"

loop

Draw.Line (horizontal + 15, vertical, horizontal - 15, vertical, 2)
Draw.Line (horizontal, vertical + 15, horizontal, vertical - 15, 2)

locate (1, 1)
if hasch then
getch (keyinput)
end if
if keyinput = chr (119) then %up arrow
vertical += 5
keyinput := "x"
elsif keyinput = chr (100) then %right arrow
horizontal += 5
keyinput := "x"
elsif keyinput = chr (97) then %left arrow
horizontal -= 5
keyinput := "x"
elsif keyinput = chr (115) then %down arrow
vertical -= 5
keyinput := "x"
end if

View.Update
cls
exit when keyinput = chr (10)
end loop

[syphon4]

code:

var input : array char of boolean Input.KeyDown (input)         if input (KEY_UP_ARROW) then     % up             y2 := y2 + 2         elsif input (KEY_RIGHT_ARROW) then     % right             x2 := x2 + 2         elsif input (KEY_LEFT_ARROW) then     % left             x2 := x2 - 2         elsif input (KEY_DOWN_ARROW) then     % down             y2 := y2 - 2           end if

make an object you want to move

[lyam_kaskade]

And instead of

code:

x2:=x2+2

you could put

code:

x2+=2

[syphon4]

was that post really necessary your way is exactly the same as mine tell me does it make your program more efficiant if......

x2:=x2+1 or x2+=1

NO it doesnt

[lyam_kaskade]

If my post wasn't necessary, then you're response was even less necessary.
Anyway, yes it's important to use proper format when coding, it makes your code less cluttered and easier to read.

EDIT:
Also, since assigning a new value to a variable based on it's original value is something very common in programming, augmented assignment operators allow you to type code that much faster.

[vagyb]

syphon4 wrote:

was that post really necessary your way is exactly the same as mine tell me does it make your program more efficiant if......

x2:=x2+1 or x2+=1

NO it doesnt

his post was pretty necessary since its best to keep things short and simple.