python

score = eval(input("输入成绩："))
if score >= 90:         
    g = 'A'
elif score >= 80:      
    g = 'B'
elif score >= 70:      
    g = 'C'
elif score >= 60:      
    g = 'D'
else:
    g = 'E'
print('分数{},转换后{}'.format(score, g))