说明：  用C语言编写的四子棋游戏，四子棋的游戏规则自己去查吧，本程序包含人机对战和人人对战的功能，支持悔一步棋，由于编写的时间比较早了，算法不是很成熟，所以电脑的AI不是很高，但有心的朋友可以在此基础上自己修改代码使电脑的AI更高。
(Using C language Chess Game four sons, four sub-game rules of the game to check their own right, the program includes man-machine war and all the functions of war in support of regret a move, because the preparation of relatively early time, the algorithm is not very sophisticated, so the computer' s AI is not very high, but the concerned friends can modify their own code based on the computer' s AI higher.)