#include <fstream> 
#include <iostream> 
#include <boost/iostreams/filtering_streambuf.hpp> 
#include <boost/iostreams/copy.hpp> 
#include <boost/iostreams/filter/bzip2.hpp> 
int main() 
{ 
  using namespace std; 
  using namespace boost; 
  using namespace boost::iostreams; 
  ifstream file("hello.bz2", ios_base::in | ios_base::binary); 
  filtering_streambuf<input> in; 
  in.push(bzip2_decompressor()); 
  in.push(file); 
  boost::iostreams::copy(in, cout); 
}