电子老鼠迷宫：输入起点坐标和终点坐标（最小为1 1，最大为12 12），以及一个20*20的迷宫（“.”表示通道，否则就是墙），就能找出到终点的最短步数。-E-rat maze: Enter the starting point coordinates and end coordinates (minimum of 1 1, a maximum of 12 12), and a maze of 20* 20 ( " ."　Said the channel, otherwise, it is the wall), will be able to find step-by-step to the end of the shortest a few.