class problem...

[Edmanuel E. Torres]

Hi friends

The code below are a little variation of the example ex9.C found into GAlib, I'm treating to put it into the member function of the class named crga without successful, becouse any genome.phenotype() update its values. 
I can't understand why. I'm a newbie using GAlib, I will be very grateful with some help.

TIA

Edmanuel Torres

--------------------------------- crga.h -----------------------------
#include <ga/ga.h>
#include <math.h>
#include <iostream.h>

class CRga{
public:
	CRga();
	typedef float (*Evaluator)(GAGenome &);
	void CGgaTrain(Evaluator f);
	int   popsize, ngen, seed;
	float pmut, pcross;
};
----------------------------------------------------------------------
-------------------------------- crga.cpp ----------------------------
#include "CRga.h"

CRga::CRga(){
	popsize  = 10;
	ngen     = 10;
	pmut     = 0.01;
	pcross   = 0.6;
	seed     = 5;
}

void CRga::CGgaTrain(Evaluator f){
  
  GABin2DecPhenotype map;
  map.add(16, -10, 10);
  map.add(16, -10, 10);
  GABin2DecGenome genome(map, f);

  GASimpleGA ga(genome) ;
  GASigmaTruncationScaling scaling;
  ga.populationSize(popsize);
  ga.nGenerations(ngen);
  ga.pMutation(pmut);
  ga.pCrossover(pcross);
  ga.scaling(scaling);
  ga.scoreFilename("bog.dat");
  ga.scoreFrequency(10);
  ga.flushFrequency(50);
  ga.evolve(seed);

  genome = ga.statistics().bestIndividual();
  cout << "the ga found an optimum at the point (";
  cout << genome.phenotype(0) << ", " << genome.phenotype(1) << ")\n\n";
  cout << "best of generation data are in '" << ga.scoreFilename() << "'\n";
}
----------------------------------------------------------------------
---------------------------------main.cpp ----------------------------

#include "crga.h"

float objective(GAGenome &);
float sigmoid(float x);

int main(int argc, char **argv)
{
  CRga rga;
  cout << "This program finds the minimum value in the error function\n";
  cout << "over the interval (0,1)\n";
  cout << "\n"; cout.flush();
  rga.CGgaTrain(objective);
  return 0;
}
// This objective function tries to maximize the value of the function
//
float objective(GAGenome & c)
{
	GABin2DecGenome & genome = (GABin2DecGenome &)c;
	float y;
	y = genome.phenotype(0) + 10*sin(5*genome.phenotype(0)) \
     + 7*cos(4*genome.phenotype(0)) - 10*sin(2*genome.phenotype(1))\
     +23*cos(6*genome.phenotype(1));
	return y;
}
----------------------------------------------------------------------



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