int direction = MovDir[x][y];
int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
int dy = (direction == MV_UP ? -1 : direction == MV_DOWN ? +1 : 0);
int direction = MovDir[x][y];
int dx = (direction == MV_LEFT ? -1 : direction == MV_RIGHT ? +1 : 0);
int dy = (direction == MV_UP ? -1 : direction == MV_DOWN ? +1 : 0);