int isdelknot(pointnames *graph){
pointnames *current = NULL;
current = graph;
current = current->next;
while (current != NULL){
marker_null(graph);
current->locate->marker = 2;
if (iscycle(graph)==0) return 1;
current = current->next;
}
return 0;
}
int main()
{
struct graph *g=(struct graph*)malloc(sizeof(struct graph));
creat_graph(3,3,g);
add_edge(g,0,1,0);
add_edge(g,1,2,1);
add_edge(g,2,0,2);
if(iscycle(g))
printf("Cycle is detected\n");
else
printf("Cycle is not detected\n");
return 0;
}
