In a linked list display nth element from the last.

void fromlast(int n)

{

      node *ptr=start,*loc=start;

      int i=0;

      while(ptr!=NULL)

      {

            if(i<n)

                  i++;

            else

                  loc=loc->next;

            ptr=ptr->next;

      }

      cout<<"\nelement is "<<loc->data;

}