Thread: Pointer modification

If I may ask a related pointers question:

Code:

void eQ(List* l, Vertex* v){
	List* new = malloc(sizeof(List*)); new->v = v;
	if (l == NULL) l = new;
	else{
		List* temp = l;
		while (temp->next != NULL) temp = temp->next;
		temp->next = new;
	}
}
void connect(Vertex* v, Vertex* u){
	int i = vIndex(v); int j = vIndex(u);
	AC[i][j] = 1; AC[j][i] = 1;
	eQ(v->adj, u); eQ(u->adj, v);
}

Now unfortunately exiting eq(..) v->adj and u->adj remain unchanged pointing to null. I know of the solution: v->adj = eQ(v->adj, u) but I'd like to get the 'pointers' solution to work as well. Could someone suggest the code modifications to make to achieve that?

PS: The structures referred to here are posted in my other thread of the day 'Deadlock prevention in C'

By passing the the address of &v->adj and &u->adj to eQ().