坑同事技巧+1

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class Point
{
public:
	Point() { _x = _y = 0; }

	Point &operator()( int dx, int dy )
	{
		_x += dx; _y += dy;
		return *this;
	}

private:
	int _x, _y;
};

int main()
{
	Point pt;   // 初始化为 (0, 0)
	pt( 3, 2 ); // 这他妈不是函数……
}