func main() {
var diameter C.igraph_integer_t
var graph C.igraph_t
var v1, v2, v3 C.igraph_integer_t = 1000, 0, 0
var v4 C.igraph_vector_t
C.igraph_rng_seed(C.igraph_rng_default(), 42)
C.igraph_erdos_renyi_game(&graph, C.IGRAPH_ERDOS_RENYI_GNP, v1, 5.0/1000,
C.IGRAPH_UNDIRECTED, C.IGRAPH_NO_LOOPS)
C.igraph_diameter(&graph, &diameter, &v2, &v3, &v4, C.IGRAPH_UNDIRECTED, 1)
log.Println("Diameter: ", diameter)
C.igraph_destroy(&graph)
}
// release memory allocated to the graph
func (g *Graph) Cleanup() {
C.igraph_destroy(g.graph)
g.edges.Cleanup()
g.weights.Cleanup()
}