C program to reverse a string.

#include <stdio.h>
#include <string.h>

int main()
{
   char arr[100];

   printf("Enter a string to reverse\n");
   gets(arr);

   strrev(arr);

   printf("Reverse of the string is \n%s\n", arr);

   return 0;
}

Output:-
Enter a string to reverse
INDIA
Reverse of the string is
AIDNI