/* -*- mode: C -*-  */
/* 
   IGraph library.
   Copyright (C) 2006-2012  Gabor Csardi <csardi.gabor@gmail.com>
   334 Harvard street, Cambridge, MA 02139 USA
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc.,  51 Franklin Street, Fifth Floor, Boston, MA 
   02110-1301 USA

*/

#include <igraph.h>

void print_vector(igraph_vector_t *v) {
  long int i, n=igraph_vector_size(v);
  for (i=0; i<n; i++) {
    printf(" %li", (long int) VECTOR(*v)[i]);
  }
  printf("\n");
}

int main() {
  
  igraph_t g;
  igraph_integer_t result;
  igraph_integer_t from, to;
  igraph_vector_t path;
  
  igraph_barabasi_game(&g, 30, /*power=*/ 1, 30, 0, 0, /*A=*/ 1, 
		       IGRAPH_DIRECTED, IGRAPH_BARABASI_BAG, 
		       /*start_from=*/ 0);
  igraph_diameter(&g, &result, 0, 0, 0, IGRAPH_UNDIRECTED, 1);
  
/*   printf("Diameter: %li\n", (long int) result); */
  
  igraph_destroy(&g);

  igraph_ring(&g, 10, IGRAPH_DIRECTED, 0, 0);
  igraph_vector_init(&path, 0);
  igraph_diameter(&g, &result, &from, &to, &path, IGRAPH_DIRECTED, 1);
  printf("diameter: %li, from %li to %li\n", (long int) result,
	 (long int) from, (long int) to);
  print_vector(&path);
  
  igraph_vector_destroy(&path);
  igraph_destroy(&g);

  return 0;
}
