Question

我是编码新手，Python是我学习的第一门语言。我正在尝试开发一个基本的计算器。数字不能等于零，用户必须使用数字1-4来选择加法，减法，乘法和除法。

我的挑战是：当我输入一个等于零的数字或一个不是1-4的数字时，这些函数应该提示我输入正确的值，然后更新变量以相应地继续计算。代码生成错误消息并要求输入该数字的新输入，但它不保存新输入，因此它不会产生正确的输出。

例如，如果我输入一个数字== 0，它会提示我输入一个新数字，但它会保持零作为第一个数字。然后，如果我对第二个数字执行相同操作，程序会停止并且它不会计算任何内容。

如果有人可以帮助我，我会非常感激......如果这不是最优雅的代码我会道歉，但请记住这是我的第一次尝试...： - ））

我在dpaste上发布此代码，以防在此处看到它无效：强文 https://dpaste.de/hyKa

def number (n):
    while n == 0:
        print ("ERROR - number must be different than zero")
        n = float(input("Enter a different number. \n"))
        number (n)
        return n

x = int(input("Enter your first number. \n"))

number (x)

def operator_control (user_choice):
    while user_choice > 4 or 1 > user_choice:
         print ("ERROR - you must choose either 1, 2, 3, or 4 depending on the operation you want")
         user_choice = int(input("Let's try again - enter another number for the operator  \n"))
         return user_choice
    return user_choice

user_choice = int(input("Now you will choose the operation! Ready? Choose 1 for addition, 2 for subtraction, 3 for multiplication and 4 for division \n"))

operator_control (user_choice)

z = int(input("Please choose your second number as the operand for the calculation. \n"))

number (z)

operator = user_choice

if operator == 1:
   result = x + z
   print ("Ok - you chose to add your first number," , x , "to" , z , "and the result of this calculation is" , result)

if operator == 2:
   result = x - z
   print ("Awesome - you chose to subtract your second number," , z , "from" , x , "and the result of this calculation is" , result)

if operator == 3:
   result = x * z
   print ("Fantastic! You chose to multiply your first number," , x , "by the second one" , z , "and the result is" , result)

if operator == 4:
   result = x / z
   print ("Fabulous! You chose to divide your first number," , x , "by the second one" , z , "and the result is" , result)

while循环使用Python后，变量不会更新

0 个答案: