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


main() {
   auto_ptr<int> p1(new int) ; // standard init
   auto_ptr<int> p2(p1) ;      // change of ownership
   auto_ptr<int> p3 ;          // not initialized

   int n = *p2 ;       // dereference

   auto_ptr<string> p4(new string("foobar")) ;
   int length = p4->size() ;

   cout << "sizeof(auto_ptr<int>) = " << sizeof(auto_ptr<int>) << endl ;
}