9  8  7
6  5  4
3  2  1

def functionToPrint(arra, r, c):
   for i in range(r):
      for j in range(c):
         if (i == 0):
            print(arra[i][j])
         elif (i == r-1):
            print(arra[i][j]) 
         elif (j == 0):
            print(arra[i][j])
         elif (j == c-1):
            print(arra[i][j])
         else:
            print(" ")

if __name__ == "__main__":
   arra = [[1, 2, 3, 4], [5, 6, 7, 8],
      [9, 10, 11, 12], [13, 14, 15, 16]]

   print("给定矩阵的边缘元素为：")
   functionToPrint(arra, 4, 4)

给定矩阵的边缘元素为：
1
2
3
4
5


8
9


12
13
14
15
16