#include <iostream>
#include <vector>
#include <memory>
using namespace std;
//Use pointers to avoid a copy


class student
{
	public:
	 int id  ;
	 student( int idP )
	  {
		  id = idP ;
		  cout << "Constructor called for  ;" << id << endl ;
	  }
	 student( const student& obj1 )
	  {
		  id = obj1.id ;
		  cout << "Copy Constructor called for  ;" << id << endl ;
	  }

	 ~student(  )
	  {
		  cout << "Destructor called for  ;" << id << endl ;
	  }

};



int main()
{

   // create a vector to store int
   vector< shared_ptr<student> > vec;

   {
     shared_ptr<student> valuePtr( new student(1) ) ;
     // display the original size of vec
     cout << "vector size = " << vec.size() << endl;
     // push 5 values into the vector
     vec.push_back( valuePtr );
     //valuePtr gets destroyed here but
     //delete is not called for valuePtr
   }

   cout << "value of vec [" << 0 << "] = " << vec[0]->id << endl;

   return 0;
}