井子游戏DOS版，利用控制台进行运行。游戏内容与WINDOWS版一致，电脑AI与玩家谁先连线满三个，谁就获胜。相比WINDOWS版，DOS版更清晰，逻辑更明了，代码可读性强-Well sub-DOS version of the game, use the console to run. Game content consistent with the WINDOWS version, the computer AI with the player who should connect at least three, whoever wins. Compared WINDOWS version, DOS version clearer, more logical and clear, readable code