1         void shokika()
   2         {
   3                 int x, y, x2, y2, w, cnt;
   4                 ...
   5                 ...
   6                 for (cnt = 0; cnt < (tate*yoko*2); cnt++)
   7                 {
   8                         x = (int)(Math.random() * (yoko-1));
   9                         y = (int)(Math.random() * (tate-1));
  10                         if(Math.random() < 0.5)
  11                         {
  12                                 x2 = x;
  13                                 y2 = y + 1;
  14                         }
  15                         else
  16                         {
  17                                 x2 = x + 1;
  18                                 y2 = y;
  19                         }
  20                         w = ban[x][y];
  21                         ban[x][y] = ban[x2][y2];
  22                         ban[x2][y2] = w;
  23                 }
  24         }