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/* -*- mode: C -*- */
/*
IGraph library.
Copyright (C) 2006-2012 Gabor Csardi <csardi.gabor@gmail.com>
334 Harvard st, 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>
#include <math.h>
int main() {
igraph_t g;
igraph_real_t res;
/* Trivial cases */
igraph_ring(&g, 100, IGRAPH_UNDIRECTED, 0, 0);
igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_DEFAULT);
igraph_destroy(&g);
if (res != 1) {
return 1;
}
/* Small test graph */
igraph_small(&g, 0, IGRAPH_DIRECTED,
0, 1, 0, 2, 0, 3, 1, 0, 2, 3, 3, 2, -1);
igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_RATIO);
igraph_destroy(&g);
if (res != 0.5) {
fprintf(stderr, "%f != %f\n", res, 0.5);
return 2;
}
igraph_small(&g, 0, IGRAPH_DIRECTED, 0,1,1,2,2,1, -1);
igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_DEFAULT);
igraph_destroy(&g);
if (fabs(res - 2.0/3.0) > 1e-15) {
fprintf(stderr, "%f != %f\n", res, 2.0/3.0);
return 3;
}
return 0;
}
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