1 /* -*- mode: C -*- */
2 /*
3 IGraph library.
4 Copyright (C) 2007-2012 Gabor Csardi <csardi.gabor@gmail.com>
5 334 Harvard street, Cambridge, MA 02139 USA
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 02110-1301 USA
21
22 */
23
24 #include <igraph.h>
25 #include <stdio.h>
26
main()27 int main() {
28 igraph_t g;
29 FILE *ifile;
30
31 ifile = fopen("karate.gml", "r");
32 if (ifile == 0) {
33 return 10;
34 }
35
36 igraph_read_graph_gml(&g, ifile);
37 fclose(ifile);
38
39 if (igraph_is_directed(&g)) {
40 printf("directed\n");
41 } else {
42 printf("undirected\n");
43 }
44
45 igraph_write_graph_edgelist(&g, stdout);
46 printf("-----------------\n");
47 igraph_write_graph_gml(&g, stdout, 0, "test suite");
48 igraph_destroy(&g);
49
50 return 0;
51 }
52