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

void printBits(int x)
{
   int i;

   for (i = 7; i >= 0 ; i--)
      if ( (x & (1<<i)) != 0 )
         putchar('1');   
      else
         putchar('0');   
}

int main(int argc, char *argv[] )
{
   FILE *fp;
   int i, c;

   if ( argc < 2 )
   {
      printf("Usage: %s filename\n\n", argv[0]);
      exit(1);
   }

   if ( (fp = fopen(argv[1], "r")) == NULL )
   {
      printf("Error: can't open file %s\n\n", argv[1]);
      exit(1);
   }

   printf("Content of file %s in binary code:\n\n", argv[1]);

   i = 1;
   while ( (c = fgetc( fp )) != EOF )
   {
      printBits(c);
      printf("  ");

      if ( i%8 == 0 )
         putchar('\n');
      i++;
   }  
   putchar('\n');
   putchar('\n');
}