So I made a tic tac toe game.
The AI is perfect (I think). I don't think you can beat it, just tie or lose.
Operating system: XP SP2
Compiler: Code::Blocks
Graphics Library: None
Other Libraries: None
http://www.opticalmusic.net/filesforever/tictactoe.zip
Edit: Nevermind, you can beat it. It's hard to do through.
Edit: OK, updated it so you really can't beat it.