Question

我的GPA计算器似乎不起作用。我输入的任何值组合都将返回0.0的GPA。代码在我的IDE中格式正确，但我不知道如何在这里缩进，抱歉。

def gpacalculator(grade,credit):
    gradescore = 0
    gradescore = int(gradescore)
    if grade in ("A","Z"):
        gradescore = 4*credit
    elif grade == "B+":
        gradescore = 3.5*credit
    elif grade == "B":
        gradescore = 3*credit
    elif grade == "C+":
        gradescore = 2.5*credit
    elif grade == "C":
        gradescore = 2*credit
    elif grade == "D+":
        gradescore = 1.5*credit
    elif grade == "D":
        gradescore = 1*credit
    elif grade == "F":
        gradescore = 0*credit

    return gradescore

subject = input("How many subjects would you like to calculate?")
subject = int(subject)
print("The different levels of grades are: Z, A, B+, B, C+, C, D+, D, F")
a = 0
a = int(a)
for a in range(0,subject):
    grade = str(input("What's your grade for subject number " + str(a+1) + "?"))
    grade.upper()
    credit = int(input("What's the number of credits for subject number " + str(a+1) + "?"))

totalcredit = 0
totalcredit - int(totalcredit)
totalcredit+=credit

totalgradescore = 0
totalgradescore = int(totalgradescore)
totalgradescore += gpacalculator(grade,credit)

gpa = totalgradescore/totalcredit
print("Your GPA is: ",gpa)

Answer 1

你遇到的第一个错误是totalcredit - int(totalcredit)我完全摆脱了它，因为如果你声明它等于0，则不需要将totalcredit变成int。变量{同样{1}}和totalgradescore。您遇到的下一个问题是a，您需要设置grade.upper。最后，您需要将grade = grade.upper()添加到credit，并将您的返回值缩进到totalcredit，因为您要在每个课程中更改它们，并移动它们在for循环之前声明，因为你不希望它们在每次迭代时重置。

最终代码应如下所示：

totalgradescore

Answer 2

你的问题很简单

string.upper（s）返回s的副本，但小写字母转换为大写字母。

这意味着您必须将回报分配给变量。如果您测试程序输入大写等级，它可以正常工作。

所以只需进行此更改

for a in range(0,subject):
  grade = str(input("What's your grade for subject number " + str(a+1) + "?"))
  grade = grade.upper()
  credit = int(input("What's the number of credits for subject number " + str(a+1) + "?"))

另外，如果您将一个没有小数点的文字编号分配给变量，那么变量的类型将是整数，您不需要在下一行中转换它。

GPA计算器始终返回0.0

2 个答案: