Python编程实现简易计算器

可以使用Python编程实现一个简易计算器。下面是一个示例代码：

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 "Error: Division by zero"
    return x / y

print("请选择操作：")
print("1. 相加")
print("2. 相减")
print("3. 相乘")
print("4. 相除")

choice = input("请选择操作(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':
    result = add(num1, num2)
    print(num1, "+", num2, "=", result)
elif choice == '2':
    result = subtract(num1, num2)
    print(num1, "-", num2, "=", result)
elif choice == '3':
    result = multiply(num1, num2)
    print(num1, "*", num2, "=", result)
elif choice == '4':
    result = divide(num1, num2)
    print(num1, "/", num2, "=", result)
else:
    print("无效的输入")