三子棋(井字棋),某天,在群里说无聊,他说那就写个三子棋玩玩吧,于是弄了2个小时,终于完成了,里面的算法清晰,注释易懂.对学习mfc的人很有帮助.-Three sons game (tic-tac-toe game), one day, in the group said nothing, he said it would write a third son to play chess now, so get the 2 hours, and finally completed, which t