#include <stdio.h>
int reverse(char s[], int i, int j)
{
  int temp;
  if(j == 1)
    return 1;
  else
  temp = s[i];
  s[i] = s[j];
  s[j] = temp;
  reverse(s, ++i, --j);
  /* recursively i am calling the same function but
  i am changing the values of the numbers*/
}
main()
{
char text[] = "Hello";
printf("Not reversed text: %s\n", text);
reverse(text, 0, strlen(text)-1);
printf("Reversed text: %s\n", text);
}