ATL / WTL / STL

The only man who never makes a mistake is the man who never does anything. - Theodore Roosevelt

class A{
std::vector<B*> m_bs;
struct sort_pB
{
  sort_pB(const A& a):a(a){}
  bool operator()(B* const pb1,B* const pb2) const
  {
    // stuff dependent on pb1, pb2 and a
  }
  const A& a;
}
 
void sort()
{
  m_bs.sort(m_bs.begin(),m_bs.end(),sort_pB(*this);
}
};

istream_iterator<int> r (ifile);

template <
  class T,
  class charT = char,
  class traits = char_traits<charT>,
  class Distance = ptrdiff_t
> istream_iterator;

...
*r++ = 0;
*r++ = 1;