[分享]py写一个计算器代码

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

def calculator():
    print("选择运算：")
    print("1. 加")
    print("2. 减")
    print("3. 乘")
    print("4. 除")

    while True:
        choice = input("输入你的选择(1/2/3/4): ")

        if choice in ['1', '2', '3', '4']:
            try:
                num1 = float(input("输入第一个数字: "))
                num2 = float(input("输入第二个数字: "))
            except ValueError:
                print("无效输入，请输入数字。")
                continue

            if choice == '1':
                print(f"{num1} + {num2} = {add(num1, num2)}")

            elif choice == '2':
                print(f"{num1} - {num2} = {subtract(num1, num2)}")

            elif choice == '3':
                print(f"{num1} * {num2} = {multiply(num1, num2)}")

            elif choice == '4':
                result = divide(num1, num2)
                print(f"{num1} / {num2} = {result}")

        else:
            print("无效输入，请选择有效的操作。")

        next_calculation = input("是否继续计算？(是/否): ")
        if next_calculation.lower() != '是':
            break

if __name__ == "__main__":
    calculator()