Question

我被要求用python编写一个计算器代码，这就是我的工作原理：

operation = input("please input your operation (+,-,*,/): ")
number_1 = int(input("Please enter your first number: ")) 
number_2 = int(input("Please enter your second number: ")) 

if operation == '+': 
    print("result: ",(number_1 + number_2)) 

elif operation == '-': 
    print("result: ",(number_1 - number_2)) 

elif operation == '*': 
    print("result: ",(number_1 * number_2)) 

elif operation == '/':
    print("result: ",(number_1 / number_2))

else: 
    print("Invalid input")

现在，我只想添加一个限定符，如果用户输入0作为“ number_2”，程序将显示“错误！无法除以0 ！！”

Answer 1

一种选择是在执行计算之前仅检查number_2是否包含零：

elif operation == '/':
    if number_2 != 0:
        print("result: ",(number_1 / number_2))
    else:
        print("Cannot divide by 0")

另一种选择是捕获每次尝试除以ZeroDivisionError时抛出的0：

elif operation == '/':
    try:
        print("result: ",(number_1 / number_2))
    except ZeroDivisionError:
        print("Cannot divide by 0")

Answer 2

从更改代码：

operation = input("please input your operation (+,-,*,/): ")
number_1 = int(input("Please enter your first number: ")) 
number_2 = int(input("Please enter your second number: ")) 

if operation == '+': 
print("result: ",(number_1 + number_2)) 

elif operation == '-': 
print("result: ",(number_1 - number_2)) 

elif operation == '*': 
print("result: ",(number_1 * number_2)) 

elif operation == '/':
print("result: ",(number_1 / number_2))

else: 
print("Invalid input")

收件人：

operation = input("please input your operation (+,-,*,/): ")
number_1 = int(input("Please enter your first number: ")) 
number_2 = int(input("Please enter your second number: ")) 

if operation == '+': 
print("result: ",(number_1 + number_2)) 

elif operation == '-': 
print("result: ",(number_1 - number_2)) 

elif operation == '*': 
print("result: ",(number_1 * number_2)) 

elif operation == '/':
   if number_2 == 0 :
      print ("Error! Cannot divide by 0!!!")
   else:
      print("result: ",(number_1 / number_2))

else: 
print("Invalid input")

Answer 3

在您的if判断代码段中嵌套一个'/'。

operation = input("please input your operation (+,-,*,/): ")
number_1 = int(input("Please enter your first number: ")) 
number_2 = int(input("Please enter your second number: ")) 

if operation == '+': 
    print("result: ",(number_1 + number_2)) 

elif operation == '-': 
    print("result: ",(number_1 - number_2)) 

elif operation == '*': 
    print("result: ",(number_1 * number_2)) 

elif operation == '/':
    if number_2 == 0:
        print("Error! Cannot divide by 0!!!")
    else:
        print("result: ",(number_1 / number_2))

else: 
    print("Invalid input")

Answer 4

我们不能除以0。

但是请使用异常处理Python exception handling

解决此问题

see here why can't divide by zero

const screen = {
    component: {
        name: "mad.app.Dummy",
    }
}

基本的Python计算器帮助：打印无法除以0

4 个答案: