題解 | #牛牛的績點(diǎn)#
牛牛的績點(diǎn)
http://www.fangfengwang8.cn/practice/de8bc3e736164786b07a4dd64ed172f7
class_score = {"A":4.0,"B":3.0,"C":2.0,"D":1.0,"F":0} #鍵值對存儲在字典內(nèi)
class_list = [] #等級列表
score_list = [] #學(xué)分列表
while True:
a = input()
if a == 'False':
break
else:
b = input()
class_list.append(a)
score_list.append(b)
sum_score = 0 #總學(xué)分績
total_score = 0 #總學(xué)分
for i in range(len(score_list)):
sum_score += int(score_list[i])*int(class_score[class_list[i]])
total_score += int(score_list[i])
print('%.2f'%(sum_score/total_score))
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