如何使用Python实现简单的计算器

import math

class Calculator:
    def add(self, x, y):
        return x + y

    def subtract(self, x, y):
        return x - y

    def multiply(self, x, y):
        return x * y

    def divide(self, x, y):
        if y == 0:
            return "Error: division by zero!"
        else:
            return x / y

    def power(self, x, y):
        return x ** y

    def square_root(self, x):
        return math.sqrt(x)

# 实例化Calculator类
calc = Calculator()

# 加法示例
print("1 + 2 =", calc.add(1, 2))

# 减法示例
print("5 - 3 =", calc.subtract(5, 3))

# 乘法示例
print("4 * 6 =", calc.multiply(4, 6))

# 除法示例
print("9 / 3 =", calc.divide(9, 3))

# 求幂示例
print("2 ^ 4 =", calc.power(2, 4))

# 开方示例
print("Square root of 16 is", calc.square_root(16))

1 + 2 = 3
5 - 3 = 2
4 * 6 = 24
9 / 3 = 3.0
2 ^ 4 = 16
Square root of 16 is 4.0