Given an array of strings, you need to sort it using "qsort"
function provided by C. You can use the "strcmp" function provided
by the C language as well.

#define SIZEOF(arr) (sizeof(arr)/sizeof(arr[0]))
int main()
{
        char *arr[]={"abc","def","abcd"};
        int i;

        /*
        * code to sort..
        *...
        *...
        */

        for(i=0;i < SIZEOF(arr);i++)
                printf("%s\n",arr[i]);
}

Here is a game one can buy in most toy stores.
It's called Hi-Q (or Brainvita).
32 pieces are arranged on a board as shown below:

         X   X   X

         X   X   X

 X   X   X   X   X   X   X

 X   X   X   o   X   X   X

 X   X   X   X   X   X   X

         X   X   X

         X   X   X


* Only the centre position is unoccupied.
* A piece is allowed to move by jumping over one of it's neighbours into
  an empty space.
* Diagonal jumps are not permitted.
* When a piece is jumped over, it is removed from the board.

Write an algorithm which determines a series of jumps so that all of the
pieces except one are eventually removed, and the final piece ends
up at the center position.