template< class T, class CharT, class Traits, class Dist >
bool operator==( const istream_iterator<T,CharT,Traits,Dist>& lhs,
const istream_iterator<T,CharT,Traits,Dist>& rhs ); (1) template< class CharT, class Traits >
bool operator!=( const istream_iterator<T,CharT,Traits,Dist>& lhs,
const istream_iterator<T,CharT,Traits,Dist>& rhs ); (2)
Checks whether both lhs and rhs are equal. Two stream it