题解 | #牛牛的绩点#

gpa = 0.0
total_score = 0
while 1:
    grade = input()
    if grade == 'False':
        break
    score = float(input())
    if grade == 'A': 
        gpa += 4.0 * score
    if grade == 'B':
        gpa += 3.0 * score
    if grade == 'C':
        gpa += 2.0 * score
    if grade == 'D':
        gpa += 1.0 * score
    else:
        gpa += 0.0 * score
    total_score += score
print('%.2f' % (gpa/total_score))

像大一学C语言暴力if的思路