BOOST Library (1)

class implementation
{
public:
~implementation() { std::cout <<"destroying implementation\n"; }
void do_something() { std::cout << "did something\n"; }
};

void test()
{
boost::shared_ptr<implementation> sp1(new implementation());
std::cout<<"The Sample now has "<<sp1.use_count()<<" references\n";

boost::shared_ptr<implementation> sp2 = sp1;
std::cout<<"The Sample now has "<<sp2.use_count()<<" references\n";

sp1.reset();
std::cout<<"After Reset sp1. The Sample now has "<<sp2.use_count()<<" references\n";

sp2.reset();
std::cout<<"After Reset sp2.\n";
}