#include <iostream>
 #include <memory>

 using std::cout;
 using std::endl;

 using std::shared_ptr;

 struct MyInt{
   MyInt(int v):val(v){
     cout << "  Hello: " << val << endl;
   }
   ~MyInt(){
     cout << "  Good Bye: " << val << endl;
   }
   int val;
 };

 int main(){

   cout << endl;

   shared_ptr<MyInt> sharPtr(new MyInt(1998));
   cout << "    My value: " << sharPtr->val << endl;
   cout << "sharedPtr.use_count(): " << sharPtr.use_count() << endl;
   {
     shared_ptr<MyInt> locSharPtr(sharPtr);
     cout << "locSharPtr.use_count(): " << locSharPtr.use_count() << endl;
   }
   cout << "sharPtr.use_count(): "<<  sharPtr.use_count() << endl;

   shared_ptr<MyInt> globSharPtr= sharPtr;
   cout << "sharPtr.use_count(): "<<  sharPtr.use_count() << endl;
   globSharPtr.reset();
   cout << "sharPtr.use_count(): "<<  sharPtr.use_count() << endl;

   sharPtr= shared_ptr<MyInt>(new MyInt(2011));

   cout << endl;
 }