核心编程答案（第五章）

def LevelTest(score):
    if 90 <= score <= 100:
        return ‘A‘
    elif 80 <= score < 90:
        return ‘B‘
    elif 70 <= score < 80:
        return ‘C‘
    elif 60 <= score < 70:
        return ‘D‘
    elif score < 60:
        return ‘F‘
    else:
        return ‘NO FOUND‘

score = raw_input(‘Please enter you score: ‘)
score = int(score)
print LevelTest(score)

def Runnian(year):
    if (year % 4 == 0) and (year % 100 != 0) or year % 400 == 0:
        return ‘Is runnian!‘
    else:
        return ‘Is not runnin‘

year = int(raw_input(‘Please enter the year: ‘))
print Runnian(year)