1, 方法一
n = input();print("*"*n)for i in range(n-2) print("*",''*(n-2),"*")print("*"*n)
2, 方法二
n=5e = -n//2for i in range(e,n+e): if i ==e or i==n+e-1: print('x'*n) else: print('x'+''*(n-2)+'x')
来源: http://www.bubuko.com/infodetail-2991062.html