python作业01

 1 import time
 2 i=eval(input("请输入矩形的长度"))
 3 j=eval(input("请输入矩形的宽度"))
 4 while i>1 and j>1:
 5     t=time.clock()
 6     for n in range(j):
 7         if n==0 or n==j-1:
 8             print("+"*i)
 9         else :
10             print("+"+" "*(i-2)+"+")
11     break
12 print(" 绘制完成！共耗时{:.2f}s".center(50,‘=‘).format(time.clock()-t))