编辑代码

def add(x, y):
       """相加"""
       return x + y
def subtract(x, y):
        """相减"""
        return x - y
def multiply(x, y):
        """相乘"""
        return x * y
def divide(x, y):
        """相除"""
        return x / y
print("选择运算：")
print("1、相加")
print("2、相减")
print("3、相乘")
print("4、相除")
choice = input("输入你的选择(1/2/3/4):")
num1 = int(input("输入第一个数字: "))
num2 = int(input("输入第二个数字: "))
if choice == '1':
       print(num1,"+",num2,"=", add(num1,num2))
elif choice == '2':
       print(num1,"-",num2,"=", subtract(num1,num2))
elif choice == '3':
       print(num1,"*",num2,"=", multiply(num1,num2))
elif choice == '4':
       print(num1,"/",num2,"=", divide(num1,num2))
else:
       print("非法输入")