// file to deal with clueless CC
#ifndef __ITERATOR_TRAITS__
#define __ITERATOR_TRAITS__
namespace std
{

  template<typename I>
  struct iterator_traits
  {
	typedef typename I::value_type value_type;
  };

  template<typename V>
  struct iterator_traits<V*> 
  {
	typedef typename V value_type;
  };

  void swap(double& a, double& b) { double x = a; a = b; b = x; }
	
}; // namespace std
#endif  // __ITERATOR_TRAITS__