Question

我正在编写一个程序来计算一个班级的平均成绩和字母等级。每次我运行代码时都会打印出＃34;你的等级是A＆＃34;。我觉得我的def average（）函数有问题，但我无法弄明白。

它也只打印字母等级，而不是分数

homework1 = int(raw_input('Enter homework1 score: '))
homework2 = int(raw_input('Enter homework2 score: '))
quiz = int(raw_input('Enter quiz score: '))
exam = int(raw_input('Enter Final Exam Score: '))
if homework1 > 100:
        print 'Score cannot be greater than 100'
if homework1 < 0:
        print 'Score cannot be less than 0'
if homework2 > 100:
        print 'Score cannot be greater than 100'
if homework2 < 0:
        print 'Score cannot be less than 0'
if quiz > 100:
        print 'Score cannot be greater than 100'
if quiz < 0:
        print 'Score cannot be less than 0'        
if exam > 100:
        print 'Score cannot be greater than 100'
if exam < 0:
        print 'Score cannot be less than 0'   

numbers = [homework1, homework2, quiz, exam]               

def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total / len(numbers)

def get_average(numbers):
    homework = average("homework1, homework2")
    quiz = average("quiz")
    exam = average("exam")
    return .2*quiz + .2*exam + .6*homework    

def get_letter_grade(score):
    if score >= 93.333:
        return "Your grade is an A"
    elif score >= 90:
        return "Your grade is an A-"
    elif score >= 86.667:
        return "Your grade is a B+"
    elif (avg >= 83.333):
        return "Your grade is a B"
    elif (avg >= 80):
        return "Your grade is a B-"
    elif (avg >= 76.667):
        return "Your grade is a C+"
    elif (avg >= 73.333):
        return "Your grade is a C"
    elif (avg >= 70):
        return "Your grade is a C-"
    elif (avg >= 66.667):
        return "Your grade is an D"
    elif (avg >= 65):
        return "Your grade is an D-"
    else:
        return "Your grade is a F"
    if (avg == 0):
        return "There is an error"

print get_letter_grade(get_average)

Answer 1

调试代码后，我可以看到您将 get_average（）（函数）传递给 get_letter_grade（）作为参数。

print get_letter_grade(get_average)

这是第一件事。另外，Tom Karzes已经说过将字符串解析为 average（）时明确需要一个数字列表。

Answer 2

您每次都会收到“您的成绩是A”，因为您使用函数get_letter_grade作为输入调用get_average函数。

由于评估get_average > 93,333始终为True，因此您不会得到任何其他答案。

再来一次。

Answer 3

我建议您查看代码。但要解决代码中的问题，可以这样做：

homework1 = int(raw_input('Enter homework1 score: '))
homework2 = int(raw_input('Enter homework2 score: '))
quiz = int(raw_input('Enter quiz score: '))
exam = int(raw_input('Enter Final Exam Score: '))
if homework1 > 100:
        print 'Score cannot be greater than 100'
if homework1 < 0:
        print 'Score cannot be less than 0'
if homework2 > 100:
        print 'Score cannot be greater than 100'
if homework2 < 0:
        print 'Score cannot be less than 0'
if quiz > 100:
        print 'Score cannot be greater than 100'
if quiz < 0:
        print 'Score cannot be less than 0'        
if exam > 100:
        print 'Score cannot be greater than 100'
if exam < 0:
        print 'Score cannot be less than 0'   

numbers = [homework1, homework2, quiz, exam]               

def average(numbers):
    total = sum(numbers)
    total = float(total)
    return total / len(numbers)

def get_average(numbers):
    # you accessed your array in the wrong way
    homework = average(numbers[0:1])
    quiz = average([numbers[2]])
    exam = average([numbers[3]])
    return .2*quiz + .2*exam + .6*homework    

def get_letter_grade(numbers):
    # here, you mixed up 'score' and 'avg' which were both not defined
    score = get_average(numbers)
    if score >= 93.333:
        return "Your grade is an A"
    elif score >= 90:
        return "Your grade is an A-"
    elif score >= 86.667:
        return "Your grade is a B+"
    elif (score >= 83.333):
        return "Your grade is a B"
    elif (score >= 80):
        return "Your grade is a B-"
    elif (score >= 76.667):
        return "Your grade is a C+"
    elif (score >= 73.333):
        return "Your grade is a C"
    elif (score >= 70):
        return "Your grade is a C-"
    elif (score >= 66.667):
        return "Your grade is an D"
    elif (score >= 65):
        return "Your grade is an D-"
    else:
        return "Your grade is a F"
    if (score == 0):
        return "There is an error"

# You used to call the get_letter_grade with a (not called) function as an argument
print get_letter_grade(numbers)

用字母计算Python中的成绩

3 个答案: