要求：显示以*为边界的窗口，输入n=0~6，向上滚动n行 左上角*号坐标：(1,1),右下角*号坐标：(9,10)-Requirements:* For the border shows a window, enter n = 0 ~ 6, line up the upper left corner of rolling n asterisk coordinates: (1,1), the bottom-right corner asterisk coordinates: (9,10)