Hi guys!

Im facing a problem how to draw a box in the middle of the screen. If the input i entered is 7, then it should draw a box 7x7 in the middle. The calculation should be:

79-7 = 77/2=36 <---to get the culumn
24-7 = 17/2 =8.5 <---to get the row

now for the row, should i use 8 or 9 to get the coordinate? if i do use 8 or 9, will the assembly round it up to 8 or 9? Thanks!