Thread: confused with structure in function

Hello to all,

I posted again today. I have the code bellow where I am trying to get the same results in the two print outputs ( the fitness of chromosome SAME and its not true SAME ) for each old_chrome

the one is the result without the function and the other with the function

BUT MY OUTPUT IS AS BELOW


0 0 0.110000
0 1 3.100000
0 2 5.120000
1 0 2.530000
1 1 2.270000
1 2 4.130000
2 0 3.100000
2 1 1.240000
2 2 7.230000
3 0 6.780000
3 1 7.450000
3 2 3.390000
8.220000
the fitness of chromosome 0 8.220000
its not true 6.200000
the fitness of chromosome 1 6.400000
its not true 6.200000
the fitness of chromosome 2 8.470000
its not true 6.200000
the fitness of chromosome 3 10.840000
its not true 6.200000

The first lines is the reading of the parameters.

I would welcome some help about how it will work and some explanation if you also could


Many thanks
Chris

Code:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>






     struct chromosome {

   
      double fitness;
      double genes[3];         
                        };

struct chromosome old_chrome[4];


double fit(struct chromosome *p);




    main()

{


  /****DECLARE VARIABLES****/ 

  FILE *fpl_0;
  FILE *fpl_1; 
  FILE *fpl_2;
  FILE *fpl_3;

  double n1;
  int i, j,n2;
  int k=0;
  int num_of_chromes;
  int num_of_genes;
  char line[100];
  /*****************************/





  /********READ INPUT DAT..........****/





  fpl_0=fopen("data_fit", "r");

  if (fpl_0==NULL)
    {
      printf("UNABLE TO OPEN INPUT FILE TO READ PROGRAM PARAMETERS\n");
	exit(1);
    }

  while (fgets(line,100,fpl_0)!=NULL)
    {

      sscanf(line,"%d %d", &num_of_chromes, &num_of_genes);
    }

  fclose(fpl_0);






  
  fpl_1=fopen("input_fit","r");


  if (fpl_1==NULL)
    { 
      printf("UNABLE TO OPEN INPUT FILE TO READ GENES DATA\n");
      exit(2);
    } 



  for (i=0;i<num_of_chromes;i++)

    {
      for (j=0;j<num_of_genes;j++)

	{
	  fscanf(fpl_1,"%lf",&old_chrome[i].genes[j]);
        }
	
    }


  fclose(fpl_1);
 
  /********************CLOSE INPUT FILES*************/
 




  /****************PRINT INPUT DAT..........***************/

  printf("*****************INPUT*************************\n");
 

  for(i=0;i<num_of_chromes;i++)
    {
      for (j=0;j<num_of_genes;j++)

	{
	  printf("%d %d %lf\n",i,j,old_chrome[i].genes[j]);

	}      


  
    }

 printf("%lf\n",old_chrome[0].genes[1]+old_chrome[0].genes[2]);



 /* UNTILL HERE READ DATA TO STRUCTURE FROM FILE AND CHECK IF IS OK***/

 for (i=0;i<num_of_chromes;i++)

   {
     old_chrome[i].fitness=old_chrome[i].genes[1]+old_chrome[i].genes[2];

     printf("the fitness of chromosome %d %lf \n", i,old_chrome[i].fitness);
  
   
  
     n1=fit(old_chrome);

     printf("its not true %lf\n",n1);
     
   } 
}



/*******fitness function******/


double fit(struct chromosome *p)

{
  
  int i;
  double a;

  a = p->genes[1]+p->genes[1];
  return a;

}

ok but if you look carefully I am taking the same number. This is not the problem !!!!!

The problem is that clearly I miss the point with the function

Originally Posted by Chris_1980

ok but if you look carefully I am taking the same number. This is not the problem !!!!!

In addition to 2 being a different number from 1, you are always passing old_chrome[0] to the function, despite apparently desiring to pass old_chrome[i].