Question

无法尝试打印“问题”功能中定义的“得分”变量。令人不安的代码：

def question(attempt, answer):
    score = 0
        #if attempt is true, add 1 to score
        #if attempt is false, do nothing to score
    if attempt == answer:
        score += 1

print("How many ducks are there?")
question(input(), "14")

print("Your score is %r." % score)

虽然，当我尝试运行它时，我得到的只是：

Traceback (most recent call last):
  File "quiz.py", line 11, in <module>
    print("Your score is %r." % score)
NameError: name 'score' is not defined

任何有关确定变量放置位置的帮助都将非常感激。

Answer 1

您必须缩进函数中运行的代码，还必须从函数中返回一些值

def question(attempt, answer):
    score = 0
    #if attempt is true, add 1 to score
    #if attempt is false, do nothing to score
    if attempt == answer:
        score = 1
    return score

您应该计算该函数之外的全局分数，即 score += question(attempt, answer)

Answer 2

def question(attempt, answer):
    score = 0
    #if attempt is true, add 1 to score
    #if attempt is false, do nothing to score
    if attempt == answer:
        score += 1
        return score
    print("Your score is %r." % score)

我会在函数中打印它，它返回：

>>> print("How many ducks are there?")
How many ducks are there?
>>> question(input(), "14")

Your score is 0.
>>>

在哪里定义使用函数的变量

2 个答案: