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

//unique_ptr
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 ;
	  }

};

void function1( shared_ptr<student> ptr )
{

  cout << "Inside function Reference count:" << ptr.use_count() << endl ;
}

int main()
{
    std::shared_ptr<student> valuePtr( new student(1) ) ;
    cout << "Student id:" << (*valuePtr).id << endl ;


    //
    cout << "Before function Reference count:" << valuePtr.use_count() << endl ;
    function1( valuePtr ) ;
    cout << "Outside function Reference count:" << valuePtr.use_count() << endl ;
    //Using the make_unique function
    shared_ptr<student> valuePtr1 = make_shared< student >(2) ;
    cout << "Student id:" << (*valuePtr1).id << endl ;

    //Reference countins is used so that the destructor is
    //called only once.
    shared_ptr<student> valuePtr2 = valuePtr ;
	cout << "Reference count:" << valuePtr2.use_count() << endl ;

    function1( valuePtr ) ;

}