p ython简易计算器

Python简易计算器是一个基本的程序示例，它允许用户输入两个数字并执行加、减、乘、除等基本算术运算。以下是一个简单的命令行交互式的Python计算器实现：

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:
        return x / y
    else:
        print("错误：除数不能为零")
        return None

print("选择操作：")
print("1. 加")
print("2. 减")
print("3. 乘")
print("4. 除")

choice = input("请输入您的选择 (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(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':
    result = divide(num1, num2)
    if result is not None:
        print(num1, "/", num2, "=", result)
else:
    print("无效的选择")