用c++做的五子棋游戏，界面美观，实现棋子边缘框的描绘-C++ to do with the backgammon game, beautiful interface, to achieve the edge of the box painted pieces

五子棋源程序。棋子在棋盘内部有效，棋子下在棋盘边缘无效。-Backgammon source. Chess pieces inside the board, a pawn in the board edge is not valid.