题解 | #牛牛的绩点#
牛牛的绩点
https://www.nowcoder.com/practice/de8bc3e736164786b07a4dd64ed172f7
笨方法
c = 0
i = 0
d=0
while True:
a = input()
if a == "False":
break
if a == "A":
b = float(input())
d=d+b
c += b * 4
if a == "B":
b = float(input())
c += b * 3
d=d+b
if a == "C":
b = float(input())
c += b * 2
d=d+b
if a == "D":
b = float(input())
c += b * 1
d=d+b
if a == "F":
b = float(input())
c += b * 0
d=d+b
i += 1
print('%.2f'%(c / d))
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