File Handling6.c

#include <stdio.h>
#include <stdlib.h>
#define CNTL_Z '\032'   /* eof marker in DOS text files */
#define SLEN 81//    w w w    .d  e  m  o    2 s  .   co    m
int main(void)
{
    char file[SLEN];
    char ch;
    FILE *fp;
    long count, last;

    puts("Enter the name of the file to be processed:");
    scanf("%80s", file);
    if ((fp = fopen(file,"rb")) == NULL)
    {                               /* read-only mode    */
        printf("reverse can't open %s\n", file);
        exit(EXIT_FAILURE);
    }
     fseek(fp, 0L, SEEK_END);        /* go to end of file */
     last = ftell(fp);
     for (count = 1L; count <= last; count++)
     {
         fseek(fp, -count, SEEK_END); /* go backward      */
         ch = getc(fp);
         if (ch != CNTL_Z && ch != '\r') /* MS-DOS files */
             putchar(ch);
     }
     putchar('\n');
     fclose(fp);

     return 0;
}