//类定义
class Player
{
	//默认是私有的
	//int x, y;
//这里的public包括了speed这个成员
public:
	int x, y;
	int speed;
};

//函数
void Move(Player& player, int xa, int ya)
{
	player.x += xa*player.speed;
	player.y += ya*player.speed;
}

int main()
{
	//player:对象
	//创建(实例化)一个对象
	Player player;
	player.x = 1;
	player.y = 2;
	player.speed = 2;
	Move(player, 1, -1);
	LOG(player.x);//3
	LOG(player.y);//0
}

//类定义
class Player
{
	//默认是私有的
	//int x, y;
//这里的public包括了speed和Move这个成员
public:
	int x, y;
	int speed;
	//方法
	void Move( int xa, int ya)
	{
		x += xa * speed;
		y += ya * speed;
	}
};



int main()
{
	//player:对象
	//创建(实例化)一个对象
	Player player;
	player.x = 1;
	player.y = 2;
	player.speed = 2;
	player.Move( 1, -1);
	LOG(player.x);//3
	LOG(player.y);//0
}