#include <iostream>

#include <string>

#include <memory>

class Item

{

public:

    Item(std::string str):name(str){}

    ~Item(){std::cout<< name << " unitialize!" <<std::endl;}

    void dump(){std::cout<< "I'am " << name <<std::endl;}

    static Item *CreateItem(std::string str)

    {

        Item *pItem = new Item(str);

        return pItem;

    }

private:

    std::string name;

};

int main()

{

    Item *pi = Item::CreateItem("common ptr");

    pi->dump();

    delete pi;

    std::auto_ptr<Item> ap1(Item::CreateItem("auto ptr"));

    ap1.get()->dump();

    std::auto_ptr<Item> ap2 = ap1;

    ap2.get()->dump();        // 此时 auto ptr 对象已经不属于 ap1

    std::shared_ptr<Item> sp1(Item::CreateItem("shared ptr"));

    sp1.get()->dump();

    std::shared_ptr<Item> sp2 = sp1;

    sp2.get()->dump();

    return ;

}