求解和为15的棋盘游戏问题。要求将从1到9的九个数填入3×3的棋盘中， 使得各行、各列以及两个对角线上的三个数之和均为15，并打印出结果。-Solving, and for 15 board game problem. From 1 to 9 request will be the number nine fill 3 by 3 board, make all, each columns, and two on the diagonal of the three Numbers are the