VC简单的智能五子棋游戏，支持电脑先走或人先走棋或者人机对战，支持悔棋，暂不支持网络对战，适合VC新手研究游戏编写-VC simple Smart backgammon games, or people to support the computer go first or go first man-machine chess battle in support of undo, does not support online play, written for VC novices of th