shared_ptr

#include <boost/shared_ptr.hpp>
#include <iostream>
using namespace std;

int main(int argc, char const *argv[])
{

    boost::shared_ptr<int> i1(new int(255));

    cout<<"use_count:"<<i1.use_count()<<endl;
    int * p = i1.get();

    cout<<"use_count:"<<i1.use_count()<<endl;
    cout<<"i1:"<<*p<<endl;

    boost::shared_ptr<int> i2 = i1;    
    cout<<"use_count:"<<i1.use_count()<<endl;
    *i2.get() = 88;
    cout<<*i1.get()<<endl;

    i2.reset();    
    cout<<"use_count:"<<i1.use_count()<<endl;

    return 0;
}