How to Reverse Quine?

Question

hi, i have written a C programme which prints itself n times, but i can't get how to reverse print the same n times.E.g, if the sample programme is :

hello

then the required output should be "olleh" for n=1. Here's my quine programme,

#include <stdio.h>
int main()
{
  int n;
  char c;
  FILE *f;
  f=fopen(__FILE__,"r");
  scanf("%d",&n);
 while(n--)
 {
 while((c=getc(f))!=EOF)
 putchar(c);
 fseek(f,0,0);
 }
  return 0;
} 

Answer 1

This is not a pure quine. See the Quine article in Wikipedia:

A quine takes no input. Allowing input would permit the source code to be fed to the program via the keyboard, opening the source file of the program, and similar mechanisms.

Answer 2

The easiest way would be to read the file into an array (like this answer), and then just reverse the array:

void swap(char* a, char* b) {
  char tmp = *b;
  *b = *a;
  *a = tmp;
}

void reverse(char* arr, int size) {
  for (int i = 0; i < size/2; ++i) {
    swap(arr+i, arr + (size - (i + 1)));
  }
}