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 +1,54 @@
+/*
+   igraph library.
+   Copyright (C) 2007-2012  Gabor Csardi <csardi.gabor@gmail.com>
+   334 Harvard street, 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 <stdio.h>
+
+int main(void) {
+    igraph_t graph;
+    FILE *ifile;
+
+    /* Initialize the library. */
+    igraph_setup();
+
+    ifile = fopen("karate.gml", "r");
+    if (ifile == 0) {
+        return 1;
+    }
+
+    igraph_read_graph_gml(&graph, ifile);
+    fclose(ifile);
+
+    printf("The graph is %s.\n", igraph_is_directed(&graph) ? "directed" : "undirected");
+
+    /* Output as edge list */
+    printf("\n-----------------\n");
+    igraph_write_graph_edgelist(&graph, stdout);
+
+    /* Output as GML */
+    printf("\n-----------------\n");
+    igraph_write_graph_gml(&graph, stdout,IGRAPH_WRITE_GML_DEFAULT_SW,  0, "");
+
+    igraph_destroy(&graph);
+
+    return 0;
+}