To compile this program just do make in terminal, then a.out or a.exe will be produced, then run it with ./a.out or ./a.exe, to work on this, we will input 3 numbers, x y a x and y tell the coordinate on which we have to place a line, a tells on the box which line is to be made, if a is 0, then top line of the box, if its 1 then right line, if its 2 then bottom line if its 4 then left line. After your move the computer will take its turn, after that you will move.