Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,53 @@
+/*
+   igraph library.
+   Copyright (C) 2006-2023  The igraph development team <igraph@igraph.org>
+
+   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, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <igraph.h>
+#include <stdio.h>
+
+int main(void) {
+    igraph_t left, right, uni;
+    igraph_vector_int_t edge_map1, edge_map2;
+
+    /* Initialize the library. */
+    igraph_setup();
+
+    igraph_vector_int_init(&edge_map1, 0);
+    igraph_vector_int_init(&edge_map2, 0);
+
+    igraph_small(&left, 4, IGRAPH_DIRECTED,
+                 0,1, 1,2, 2,2, 2,3, 2,3, 3,2,
+                 -1);
+
+    igraph_small(&right, 6, IGRAPH_DIRECTED,
+                 0,1, 1,2, 2,2, 2,3, 5,2,
+                 -1);
+
+    igraph_union(&uni, &left, &right, &edge_map1, &edge_map2);
+    igraph_write_graph_edgelist(&uni, stdout);
+    igraph_vector_int_print(&edge_map1);
+    igraph_vector_int_print(&edge_map2);
+
+    igraph_destroy(&uni);
+    igraph_destroy(&left);
+    igraph_destroy(&right);
+
+    igraph_vector_int_destroy(&edge_map2);
+    igraph_vector_int_destroy(&edge_map1);
+
+    return 0;
+}