Thread: save a spicific column from a csv file into an array

if i have a file.txt with comma separated value and i need to access the 10th and 15th columns ofthis file and save each one in an array
i tried this code (which was attached in the site) but it didn't work it always print the 3rd column of the file and i still don't know why!!

Code:

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

#define FIRST_LINE   0
#define LAST_LINE 10

int main() {

 char buf[512];
  int line_count = 0;
  FILE *file = fopen("min_chest.txt", "r");


  while (fgets(buf, sizeof buf, file) != NULL) {
    double value;

    if (sscanf(buf, "%*lf,%*lf,%lf,*%lf,%lf", &value) != 1) {
      fprintf(stderr, "sscanf failed.\n");
      exit(EXIT_FAILURE);
    }

    printf("%f\n", value);
    if (line_count++ >= 10)
      break;
  }

  fclose(file);


  return 0;
}

it was refreenced here

Reading values from a csv file in c into an array

why it always prints the 3rd column ?
and if i need to know the size of the file automatically how to know that ??
any advice of how to get it well ?