heuristic.c

人智算法基本程序

/****************************************************************/
/*    NAME: Konstantinos Roussos                                */
/*    ACCT: knr                                                 */
/*    FILE: Heurist.C                                           */
/*    ASGN: Final                                               */
/*    DATE: Mon Jul 11 02:16:03 1994                            */
/****************************************************************/

/*
 * Copyright 1994, Brown University, Providence, RI
 * See end of file for full copyright information
 */



#include "Heuristic.H"
Heuristic::Heuristic(State* goal)
{
   goal_ = goal;
}

int Heuristic::compare(State* element, State* to)
{
   if((distance((PlanningState*) element)) < 
      (distance((PlanningState*) to)))
      return 1;
   return 0;
}

int Heuristic::distance(PlanningState* element)
{
   int size = ((PlanningState *) goal_)->symbols_->difference(((PlanningState *) element)->symbols_)->size();
   return size;
}

/*
 * Copyright 1994, Brown University, Providence, RI
 *
 * Permission to use and modify this software and its documentation for
 * any purpose other than its incorporation into a commercial product is
 * hereby granted without fee.  Permission to copy and distribute this
 * software and its documentation only for non-commercial use is also
 * granted without fee, provided, however, that the above copyright notice
 * appear in all copies, that both that copyright notice and this permission
 * notice appear in supporting documentation, that the name of Brown
 * University not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior permission,
 * and that the person doing the distribution notify Brown University of
 * such distributions outside of his or her organization. Brown University
 * makes no representations about the suitability of this software for
 * any purpose.  It is provided "as is" without express or implied warranty.
 * Brown University requests notification of any modifications to this
 * software or its documentation.
 *
 * Send the following redistribution information:
 *
 *	Name:
 *	Organization:
 *	Address (postal and/or electronic):
 *
 * To:
 *	Software Librarian
 *	Computer Science Department, Box 1910
 *	Brown University
 *	Providence, RI 02912
 *
 *		or
 *
 *	[e-mail]
 *
 * We will acknowledge all electronic notifications.
 */