#!/usr/bin/python3
# -*- coding:utf-8 -*-
# @Time :2021/4/02 08:35
def getlevel(fraction):
if 90 <= fraction <= 100:
return "A"
elif 80 <= fraction < 90:
return "B"
elif 70 <= fraction < 80:
return "C"
elif 60 <= fraction < 70:
return "D"
else:
return "E"
if __name__ == "__main__":
try:
myfraction = float(input("请输入你的分数:"))
if myfraction < 0 or myfraction > 100:
flag = False
else:
flag = True
while flag:
print("你的成绩是:{}".format(getlevel(myfraction)))
myfraction = float(input("请输入你的分数:"))
if myfraction < 0 or myfraction > 100:
flag = False
else:
flag = True
except ValueError:
print("输入的内容不对")