shared_ptr释放

#include <iostream>
#include <memory>
using namespace std;

class Person
{
public:
   Person()
   {
      cout << "Person()构造" << endl;
   }

   ~Person()
   {
      cout << "~Person()析构" << endl;
   }


   Person(const Person &p)
   {
       cout << "Person()拷贝构造" << endl;
       this->name = p.name;
       this->age = p.age;
   }

   const Person& getPerson()
   {
      return *this;
   }

   string name;
   int age;
};

int main()
{
    std::shared_ptr<Person> p2;

    {
        std::shared_ptr<Person> p1 = make_shared<Person>(); 
        cout << p1.use_count() << endl;
        cout << p1.get() << endl;
        p2 = p1;
        cout << p1.use_count() << endl;
    }
    {
        cout << p2.use_count() << endl;
        cout << p2 << endl;

        p2.reset();
        cout << p2.use_count() << endl;
    }

    return 0;
}

$ g++ shared_ptr.cpp -std=c++11

$ ./a.out 
Person()构造
1
0x22ccc20
2
1
0x22ccc20
~Person()析构
0