answer = int(input("What is {number1} * {number2} ?"))在沒有函式的情況下使用時，該行作業正常，但是當我將其放入函式中時，它會引發錯誤Traceback (most recent call last): File "C:\Users\hjg\Downloads\test4.py", line 17, in <module> answer = eval(input("What is", number1, "*", number2, "?")) NameError: name 'number1' is not defined >>>。
import random, math
def quiz(answer):
number1 = random.randint(0,9)
number2 = random.randint(0,9)
if answer == correctanswer:
return print("Correct")
else:
return print("Incorrect.")
answer = int(input("What is {number1} * {number2} ?"))
correctanswer = number1 * number2
quiz(number1, number2)
uj5u.com熱心網友回復：
你對你的代碼有點困惑。number1 和 number2 應該在函式之外并且函式只需要獲取 1 個引數。嘗試這個：
import random
def quiz(answer: int):
correctanswer = number1 * number2
if answer == correctanswer:
return print("Correct")
else:
return print("Incorrect.")
number1 = random.randint(0,9)
number2 = random.randint(0,9)
answer = int(input(f"What is {number1} * {number2} ?"))
quiz(answer)
uj5u.com熱心網友回復：
如果在函式內部宣告number1and number2，則只能在函式內部訪問它們。您可以修改測驗函式，以便在其中獲取輸入，也可以在函式外部初始化變數。
你的函式也只接受一個引數，但你傳遞了兩個。您也不需要匯入math. 基本算術（加、減、乘、除等）內置于 Python 的核心中，你只需要這個math包來做更復雜的事情，比如三角學或搞亂 Pi。
例如：
import random
def quiz(question, correctanswer):
answer = int(input(question))
if answer == correctanswer:
return print("Correct")
else:
return print("Incorrect.")
number1 = random.randint(0, 9)
number2 = random.randint(0, 9)
quiz(f"What is {number1} * {number2} ?", number1 * number2)
我建議你閱讀scoping。
uj5u.com熱心網友回復：
您必須將變數放在頂部以使其成為全域變數。
import random, math
number1 = random.randint(0,9)
number2 = random.randint(0,9)
def quiz(answer):
correctanswer = number1 * number2
if answer == correctanswer:
return print("Correct")
else:
return print("Incorrect.")
answer = int(input(f"What is {number1} * {number2} ?"))
quiz(answer)
uj5u.com熱心網友回復：
因為你的范圍。number1 和 number2 在您參考它們的地方不存在。
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