Python做简易计算器

Python是一种非常适合快速开发简单工具的语言，创建一个简易计算器可以利用其简洁的语法和内置的算术运算功能。下面是一个简单的Python程序，用于实现加、减、乘、除的基本计算：

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("Error! Division by zero is not allowed.")
        return None

print("Select operation:")
print("1. Add")
print("2. Subtract")
print("3. Multiply")
print("4. Divide")

choice = input("Enter choice (1/2/3/4): ")

num1 = float(input("Enter first number: "))
num2 = float(input("Enter second number: "))

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("Invalid choice")

你可以复制这个代码到Python环境中运行，并按照提示操作。