Abdelrahman Said
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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igraph library.
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Copyright (C) 2024 The igraph development team <igraph@igraph.org>
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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, see <https://www.gnu.org/licenses/>.
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*/
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#include <igraph.h>
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#include <stdio.h>
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#include "test_utilities.h"
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int main(void) {
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igraph_t left, right, joined;
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/* Standard join. */
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printf("Standard join.\n");
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igraph_small(&left, 4, IGRAPH_UNDIRECTED, 0,1, 1,2, 2,2, -1);
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igraph_small(&right, 5, IGRAPH_UNDIRECTED, 0,1, 1,2, 2,2, 2,4, -1);
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igraph_join(&joined, &left, &right);
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print_graph(&joined);
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printf("\n");
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igraph_destroy(&left);
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igraph_destroy(&right);
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igraph_destroy(&joined);
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/* Standard directed join */
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printf("Standard directed join.\n");
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igraph_small(&left, 2, IGRAPH_DIRECTED, 0,1, -1);
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igraph_small(&right, 3, IGRAPH_DIRECTED, 0,1, 2,1, -1);
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igraph_join(&joined, &left, &right);
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print_graph(&joined);
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printf("\n");
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igraph_destroy(&left);
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igraph_destroy(&right);
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igraph_destroy(&joined);
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/* Empty graphs; the result is the null graph. */
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igraph_small(&left, 0, IGRAPH_UNDIRECTED, -1);
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igraph_small(&right, 0, IGRAPH_UNDIRECTED, -1);
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igraph_join(&joined, &left, &right);
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IGRAPH_ASSERT(igraph_ecount(&joined) != 0 || igraph_vcount(&joined) != 0);
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igraph_destroy(&left);
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igraph_destroy(&right);
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igraph_destroy(&joined);
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/* Empty graph joined with non-empty; the result is the non-empty. */
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igraph_small(&left, 4, IGRAPH_UNDIRECTED, 0,1, 1,2, 2,2, -1);
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igraph_small(&right, 0, IGRAPH_UNDIRECTED, -1);
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igraph_join(&joined, &left, &right);
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IGRAPH_ASSERT(igraph_ecount(&joined) != igraph_ecount(&left)
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|| igraph_vcount(&joined) != igraph_vcount(&left));
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igraph_destroy(&left);
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igraph_destroy(&right);
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igraph_destroy(&joined);
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VERIFY_FINALLY_STACK();
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return 0;
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}
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