void  SortedType::RetrieveItem ( ItemType&  item,   bool&  found )  
//  ASSUMES info ARRAY SORTED IN ASCENDING ORDER
{  int midPoint ;
	int  first  =  0;
   int	last  = length - 1 ;
	bool  moreToSearch  =  ( first  <=  last ) ;
	found = false ;

	while ( moreToSearch  &&  !found )
	{	midPoint  =  ( first + last ) / 2 ;
		switch ( item.ComparedTo( info [ midPoint ] ) )
    	{  case   LESS       :	   last = midPoint - 1 ;
				          moreToSearch = ( first <= last ) ;
					   break ;
		      case  GREATER  :   first = midPoint + 1 ;
				          moreToSearch = ( first <= last ) ;
					   break ;
		      case  EQUAL    :   found = true  ;
					   item = info[ midPoint ] ;
					   break ;
   	 }
   }
}