markdown渲染测试

def add(a, b):
    return a + b

result = add(1, 2)
print(result)

# 计算器类示例
class Calculator:
    def __init__(self):
        self.result = 0
    
    def add(self, x):
        self.result += x
        return self
    
    def subtract(self, x):
        self.result -= x
        return self
    
    def multiply(self, x):
        self.result *= x
        return self
    
    def divide(self, x):
        if x != 0:
            self.result /= x
        else:
            print("错误：不能除以零")
        return self
    
    def get_result(self):
        return self.result

# 使用示例
calc = Calculator()
result = calc.add(10).multiply(2).subtract(5).get_result()
print(f"计算结果: {result}")

# 另一个示例：处理列表
numbers = [1, 2, 3, 4, 5]
squared = [x * x for x in numbers]
filtered = [x for x in squared if x > 10]
print(f"原列表: {numbers}")
print(f"平方后: {squared}")
print(f"大于10的: {filtered}")