一个简单代码加减乘除Python 加减乘除的python代码如何编写

def add(x, y):

return x + y

def subtract(x, y):

return x - y

def multiply(x, y):

return x * y

def divide(x, y):

if y == 0:

raise ValueError("除数不能为0")

return x / y

def calculator():

print("请选择运算：")

print("1. 加法")

print("2. 减法")

print("3. 乘法")

print("4. 除法")

choice = input("请输入运算序号(1/2/3/4): ")

num1 = float(input("请输入第一个数字: "))

num2 = float(input("请输入第二个数字: "))

if choice == '1':

print("结果:", add(num1, num2))

elif choice == '2':

print("结果:", subtract(num1, num2))

elif choice == '3':

print("结果:", multiply(num1, num2))

elif choice == '4':

try:

print("结果:", divide(num1, num2))

except ValueError as e:

print(e)

else:

print("无效的输入，请输入正确的运算序号")

if __name__ == "__main__":

calculator()