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 +1,86 @@
+/*
+   igraph library.
+   Copyright (C) 2021  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 "test_utilities.h"
+
+int main(void) {
+
+    igraph_t g;
+    igraph_vector_t ecc;
+
+    igraph_vector_init(&ecc, 0);
+
+    printf("Null graph:\n");
+    igraph_empty(&g, 0, IGRAPH_UNDIRECTED);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nSingleton graph:\n");
+    igraph_empty(&g, 1, IGRAPH_UNDIRECTED);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nPath with isolated vertex:\n");
+    igraph_small(&g, 3, IGRAPH_UNDIRECTED,
+                 0,2,
+                 -1);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nUndirected path graph:\n");
+    igraph_path_graph(&g, 5, IGRAPH_UNDIRECTED, /* mutual */ false);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nDirected path graph:\n");
+    igraph_path_graph(&g, 5, IGRAPH_DIRECTED, /* mutual */ false);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nUndirected star:\n");
+    igraph_star(&g, 10, IGRAPH_STAR_UNDIRECTED, 0);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nOut-star:\n");
+    igraph_star(&g, 10, IGRAPH_STAR_OUT, 0);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_ALL);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    printf("\nOut-star, IGRAPH_OUT:\n");
+    igraph_star(&g, 10, IGRAPH_STAR_OUT, 0);
+    igraph_eccentricity(&g, NULL, &ecc, igraph_vss_all(), IGRAPH_OUT);
+    print_vector(&ecc);
+    igraph_destroy(&g);
+
+    igraph_vector_destroy(&ecc);
+
+    VERIFY_FINALLY_STACK();
+
+    return 0;
+}