Decodin asciied binary

/*
 *  If you have nerdy friends who like to talk in binary encoded ASCII
 *  and if you are not a digital machine
 *  or you can't read the ascii values and figure out whats written
 *  all you need to do is save the strings of 1s and 0s in fin.txt file
 *  in default directory and run this code. :)
 *
 */

#include<stdio.h>

int main()
{
  int i,j,k;
  char c, d;

  FILE *in;
  in = fopen("fin.txt","r");
  if (in==NULL) {
    printf("bye");
    return 1;
  } else {
    printf("ok");
  }

    while( 1) {
    j=d=0;
    do{
        c= fgetc(in);
        if(c=='1'){
        d<<=1;
        d = d|1;
        j++;
        } else if(c=='0') {
        d<<=1;
        j++;
        } else if (c==EOF) {
        return 0;
        } else {
        printf("%c",c);
        }
    }while(j<8);
    printf("%c", d);
    }
   return 0;
}