read inverted word from a text file

test.c

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

int main(int argc, char **argv)
{
  FILE *file = fopen("data.txt", "r");
  if (!file)
    return EXIT_FAILURE;
  
  char buffer[256];
  
  while (fgets(buffer, sizeof(buffer), file))
  {
    int i, value = 0;
    for (i = 8; --i >= 0;)
      value = (value<<1) | buffer[i] == '1';
    
    printf("%d\n", value);
  }
  fclose(file);
  
  return EXIT_SUCCESS;
}