void AutoPtrTest(void)

{

   std::auto_ptr<int> p1 (new int());

   //pass ownership

   std::auto_ptr<int> p2 = p1;

   std::cout << "p1 will raise exception:" << *p1 << std::endl;

   std::cout << "p2 is ok: " << *p2 << std::endl;

}

void AutoPtrTest(void)

{

   std::auto_ptr<int> p1 (new int());

   //pass ownership

   std::auto_ptr<int> p2 = p1; //here has a warning in GCC

   //std::cout << "p1 will raise exception:" << *p1 << std::endl;

   std::cout << "p2 is ok: " << *p2 << std::endl;

   std::shared_ptr<int> s1 (new int());

   std::shared_ptr<int> s2 = s1; //share it. point to same address

   std::cout << "s1 is ok:" << *s1 << std::endl;

   std::cout << "s2 is ok: " << *s2 << std::endl;

   std::unique_ptr<int> u1 (new int());

  // std::unique_ptr<int> u2 = u1; //cannot be compiled

   std::cout << "u1 is ok:" << *u1 << std::endl;

  // std::cout << "s2 is ok: " << *s2 << std::endl;

}