输入一个测验成绩评定A-F
A:90-100
B:80-89
C:70-79
D:60-69
F:<60
#!/usr/bin/env python
score = int(raw_input('Please enter a score:'))
def print_score(g):
print "your score is %s " % g
if 90 < score <= 100:
print_score('A')
elif score > 80:
print_score('B')
elif score > 70:
print_score('C')
elif score > 60:
print_score('D')
else:
print_score('F')
