Abdelrahman Said
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/*
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igraph library.
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Copyright (C) 2006-2012 Gabor Csardi <csardi.gabor@gmail.com>
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334 Harvard st, Cambridge MA, 02139 USA
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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#include <igraph.h>
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#include <math.h>
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int main(void) {
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igraph_t g;
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igraph_real_t res;
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/* Initialize the library. */
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igraph_setup();
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/* Trivial cases */
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igraph_ring(&g, 100, IGRAPH_UNDIRECTED, 0, 0);
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igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_DEFAULT);
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igraph_destroy(&g);
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if (res != 1) {
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return 1;
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}
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/* Small test graph */
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igraph_small(&g, 0, IGRAPH_DIRECTED,
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0, 1, 0, 2, 0, 3, 1, 0, 2, 3, 3, 2, -1);
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igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_RATIO);
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igraph_destroy(&g);
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if (res != 0.5) {
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fprintf(stderr, "%f != %f\n", res, 0.5);
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return 2;
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}
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igraph_small(&g, 0, IGRAPH_DIRECTED, 0, 1, 1, 2, 2, 1, -1);
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igraph_reciprocity(&g, &res, 0, IGRAPH_RECIPROCITY_DEFAULT);
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igraph_destroy(&g);
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if (fabs(res - 2.0 / 3.0) > 1e-15) {
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fprintf(stderr, "%f != %f\n", res, 2.0 / 3.0);
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return 3;
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}
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return 0;
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}
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