Question

我想知道如何在函数中使用变量，但在函数之外也是如此。这是我的代码的一部分，当答案是正确的时候应该在分数上加1，然后打印出总得分（有多个函数，所以我需要得分在函数之外）：

score=0
def Geography(score):
#Question 1
qa1= input("What is the capital of England? ")
if qa1.lower() == ("london"):
    print ("Correct you gain 1 point")
    score=score+1
else:
    print ("Incorrect")

Geography(score)
print ("This quiz has ended. Your score is " , score, ".")

正如你所看到的，我试图使用参数，但无论该人是否得到了正确答案，代码仍然会将得分返回为0。

Answer 1

从函数中返回score并将其分配回score

score=0
def Geography(score):
    #Question 1
    qa1= input("What is the capital of England? ")
    if qa1.lower() == ("london"):
        print ("Correct you gain 1 point")
        score=score+1
    else:
        print ("Incorrect")
    return score

score = Geography(score)
print ("This quiz has ended. Your score is " , score, ".")

Answer 2

尝试在变量“score”之前使用“global”并在“def Geography():”函数中再次访问它。此代码应该适用于代码中的所有“def”函数：

global score
score = 0


def Geography():
    # Question 1
    global score
    qa1 = input("What is the capital of England? ")
    if qa1.lower() == ("london"):
        print("Correct you gain 1 point")
        score = score + 1
    else:
        print("Incorrect")


Geography()
print("This quiz has ended. Your score is ", score, ".")

如何使用变量使其在函数内部和外部

2 个答案: