#include <stdio.h>

#define   MAXSTRING   100

int main(void)
{
   char   file_name[MAXSTRING];
   int    c;
   FILE   *ifp;

   fprintf(stderr, "\nInput a file name:  ");
   scanf("%s", file_name);
   ifp = fopen(file_name, "rb");  /* binary mode for ms-dos */
   fseek(ifp, 0, 2);              /* move to the end of the file */
   fseek(ifp, -1, 1);             /* back up one character */
   while (ftell(ifp) >= 0) {
      c = getc(ifp);              /* move ahead one character */
      putchar(c);
      fseek(ifp, -2, 1);          /* back up two characters */
   }
   return 0;
}