random.h

free library of genetic algorithms

/*
    cpplibga, free library of genetic algorithms.
    Copyright (C) 2003  Burger Y.A. (aka Jo Kruger)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Contacts:

   address: planet Terra
   e-mail:  [e-mail]
            [e-mail]
*/

#ifndef __CPPLIBGA_SELECTION_RANDOM_H__
#define __CPPLIBGA_SELECTION_RANDOM_H__

#include <stdlib.h>

#include <cpplibga/Types.h>

namespace cpplibga
{
    namespace selection
    {
	class Random
	{
	    public:

                Random() : groupSize(0)
                {
                }
            
		void setSelectionGroupSize(population_size_type x) {groupSize=x;}
		population_size_type getSelectionGroupSize() const {return groupSize;}
		
		template<typename P, typename S>
		void select(const P& population, 
			    S* selectedSolutions)
		{
		    population_size_type popSize=population.size();
                    
		    for(population_size_type t=0; t<groupSize; ++t)
		    {
			selectedSolutions->push_back(population[rand()%popSize]);
		    }
		}
	    
	    private:

		population_size_type groupSize;
	};
    }
}

#endif