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[igraph] List triangles

From: Perrone, Alexander G.
Subject: [igraph] List triangles
Date: Tue, 21 Feb 2017 16:32:31 +0000

​How can one list all the triangles in igraph C? I could not find an example in documentation. I'd like the same output as triangles(g) in R. I tried the following as an example but I cannot get it to work. Error is Segmentation fault (core dumped). Any help would be much appreciated. 

#include <igraph.h>

int main(void) {
  igraph_vector_t v;
  igraph_vector_int_t triangles;
  igraph_t graph;

  igraph_real_t edges[] = { 0, 1, 0, 2, 1, 2, 2, 3, 2, 4, 3, 4 };
  igraph_vector_view(&v, edges, sizeof(edges)/sizeof(double));
  igraph_create(&graph, &v, 0, IGRAPH_UNDIRECTED);

  igraph_list_triangles(&graph, &triangles);


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