对战版的Tic-tac-toe

网络版的带有图形用户界面的Tic-Tac-Toe游戏，游戏双方可以在不同的计算机上玩。

a.　　在每一步后，判断游戏是否结束，是否出现赢家,并且能告知玩家结果。

b.　　玩家可以申请与指定IP和端口号的玩家进行联网对战。

c.　　图形界面，用鼠标落子。

-Battle version of Tic-tac-toe online version of Tic-Tac-Toe game with a graphical user interface, both sides can play the game on a different computer. a. After each step, it is determined whether the game is over, if there is a winner, and the results can inform the players. b. Players can apply to the specified IP and port number of players network play. c. a graphical interface, use the mouse to play.