Heyo! This is a Tic-Tac-Toe game with AI that I've already posted before but I figured I'd submit into the challenge just because. Feel free to check it out and play a game or two!
How did you manage to make this with 2639 line of code in C++, C++ is supposed to be one of the most powerful langauges out there. Just for reference I made one with python and it is like 190 lines. But I guess you going for a round-a-bout way?