print("Calculator for substraction, addition, multiplication and division")sign=input("Enter a sign:")num1=float(input("Enter a number:"))num2=float(input("Enter a second number:"))def wrong_sign(): print("Sign entered is invalid please use one of those 1. - for substraction \n 2. + for addition \n 3. x or * for multiplication \n 4. / for devision")if sign == "-": print(num1-num2)elif sign == "+" : print(num1+num2)elif sign == "/": print(num1/num2)elif sign == "*" or "x": print(num1 * num2)else: wrong_sign 僅當我嘗試輸入無效符號時，沒有代碼錯誤，因為用戶什么也沒有出現，并且 wrong_sign 代碼不顯示。
4 回答
慕桂英3389331
TA貢獻2036條經驗 獲得超8個贊
這是您的正確代碼
print("Calculator for substraction, addition, multiplication and division")
sign=input("Enter a sign:")
num1=float(input("Enter a number:"))
num2=float(input("Enter a second number:"))
def wrong_sign():
print("Sign entered is invalid please use one of those 1. - for substraction \n 2. + for addition \n 3. x or * for multiplication \n 4. / for devision")
if sign == "-":
print(num1-num2)
elif sign == "+" :
print(num1+num2)
elif sign == "/":
print(num1/num2)
elif sign == "*" or sign == "x":
print(num1 * num2)
else:
wrong_sign()
無效符號的輸出
Calculator for substraction, addition, multiplication and division
Enter a sign:$
Enter a number:2
Enter a second number:3
Sign entered is invalid please use one of those 1. - for substraction
2. + for addition
3. x or * for multiplication
4. / for devision
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