Mini project Tic Tac Toe game source code in C programming

The mini project Tic Tac Toe game in C programming is a console application created without graphics. We draw the game using only asterisks, X, and O characters. The user can choose to play first or second, and the opponent is a computer algorithm. I haven't used a complex AI algorithm to implement the computer player. Implementing an AI algorithm would require creating a complex data structure, which is beyond the scope of this article. Tic Tac Toe is a relatively simple game to play and understand. Since it has a fixed number of small sets of game moves, I have formulated a series of steps to choose the best move for the computer player.

The best move for computer player is choose based on following principle.

1. At first, always check and choose wining move.
2. Second, if opponent is wining choose draw move.
3. Third, choose best next move from series of pre-define steps. 

In this article, I will explain the following items:

• Algorithm of computer player
• Flowchart of the game
• Data Structure
• Technique to switch the players, and check winner

I have explained the game in the following two articles:

Part 1: Flowchart, Algorithm of Computer Player, and Data Structure 

Part 2: Source code Explanation

Also, download the final version of game Download from GitHub.