#include"iostream"
using namespace std;
//定义一个普通类
class bookClass{
private:
	string name;
	int price;
public:
	int getPrice(){ return price; }
};
//辅助类
class Counter
{
private:
	friend class smartPoint;
	Counter(bookClass *book) :bk(book), count(1){};
	~Counter(){ delete bk; };
	int count;
	bookClass* bk;
};
//智能指针类
class  smartPoint
{
public:
	smartPoint(bookClass *bkC) :RpCnt(new Counter(bkC)){}
	smartPoint(const smartPoint &sp) :RpCnt(sp.RpCnt){ ++RpCnt->count; }
	smartPoint& operator= (const smartPoint& rhs)
	{
		++rhs.RpCnt->count;
		if (--RpCnt->count == 0)
			delete RpCnt;
		RpCnt = rhs.RpCnt;
		return *this;
	}
	
	~smartPoint(){
		if (--RpCnt->count == 0)
			delete RpCnt;
	}
private:
	Counter *RpCnt;
};