C Example to Reverse a file

This an example how to reverse a file. It is based on recursion.
The idea is to read all the file and when you reach the end(EOF) print them.

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

void reverse(FILE * file) {
 int fscanf_return_value;
 char x;
 /* read a char */
 fscanf_return_value = fscanf(file,"%c",&x) ;
 if(fscanf_return_value == EOF) { //fscanf returns EOF as the END OF FILE
  return;
 }
 reverse(file); //Get the next char
 //do something with the char e.g. print
 putchar(x);
 return;
}

int main(int argc, char *argv[]) {
 int i;
 FILE *fd;
 if (argc!=2) {
  printf("Usage : \n %s FILENAME\n",argv[0]);
  exit(0);
 }
 if(!(fd=fopen(argv[1],"r"))) {
  printf("Opening file error\n");
  exit(1);
 }
 reverse(fd);
 printf("\n\n\t---\tenoD - Done\t---\n");
 close(fd);
 exit(0);
}

To run it just give it argument the name of the file you want.

For example if the code above is in a file named reverse.c
and compiled with the command

gcc reverse.c -o reverse

just type in the konsole

./reverse reverse.c

and you will get the output bellow.
If you want to save it to another file the easiest way to do it
is to execute

./reverse reverse.c >> output.txt

Example of output is:

}
;)0(tixe 
;)df(esolc 
;)"n\---t\enoD - Donet\---t\n\n\"(ftnirp 
;)df(esrever 
} 
;)1(tixe  
;)"n\rorre elif gninepO"(ftnirp  
{ )))"r",]1[vgra(nepof=df(!(fi 
} 
;)0(tixe  
;)]0[vgra,"n\EMANELIF s% n\ : egasU"(ftnirp  
{ )2=!cgra( fi 
;df* ELIF 
;i tni 
{ )][vgra* rahc ,cgra tni(niam tni

}
;nruter 
;)x(rahctup 
tnirp .g.e rahc eht htiw gnihtemos od// 
rahc txen eht teG// ;)elif(esrever 
} 
;nruter  
ELIF FO DNE eht sa FOE snruter fnacsf// { )FOE == eulav_nruter_fnacsf(fi 
; )x&,"c%",elif(fnacsf = eulav_nruter_fnacsf 
/* rahc a daer */ 
;x rahc 
;eulav_nruter_fnacsf tni 
{ )elif * ELIF(esrever diov

>h.bildts< edulcni#
>h.oidts< edulcni#

 --- enoD - Done ---

I think it is a simple to understand example.
Another way to do it is to use fseek(FILE,SEEK_END) to move the pointer in the file at the end and then start reading a char,do something with it,use fseek(FILE,-1,SEEK_CUR) to move the pos one char back and do this untill you reach the SEEK_SET.
i hope this was helpful. Please post any comments you have.