AiSP assistance

void sortPrezime(position head)	//---------SORT PREZIME---------
{
	position prev_j, j, i, end = NULL;
	end = NULL;
	while (head->next != end)
	{
		i = head;
		prev_j = i->next;
		j = prev_j->next;
		while (j != end)
		{
			if (_strcmpi(prev_j->prez, j->prez) > 0)
			{
				prev_j->next = j->next;
				j->next = prev_j;
				i->next = j;
			}
			i = prev_j;
			prev_j = j;
			j = j->next;

		}
		end = prev_j;
	}
}
//-------------------------

void sortiranjePoGodini(position head) { //----------SORT GODINA------------
	position i, j = NULL;
	int temp = 0;

	for (i = head; i != NULL; i = i->next) {
		for (j = i->next; j != NULL; j = j->next) {
			if (i->god > j->god) {
				temp = i->god;
				i->god = j->god;
				j->god = temp;
			}
		}
	}
}
//-----------------------------


void Presjek(Position L1, Position L2, Position P){ //--------PRESJEK-------------
	Position q;

	while (L1 != NULL && L2 != NULL)	{
		if (L1->Element > L2->Element)
			L1 = L1->Next;
		else if (L1->Element < L2->Element)
			L2 = L2->Next;
		else
		{
			q = (Position)malloc(sizeof(Cvor));
			if (q == NULL)
				printf("\r\nGreska!\r\nMemorija nije alocirana.");
			else
			{
				q->Element = L1->Element;
				q->Next = P->Next;
				P->Next = q;
				P = q;
			}
			L1 = L1->Next;
			L2 = L2->Next;
		}	}	}
//-----------------------------

void Unija(Position L1, Position L2, Position U){ //-----UNIJA-----------------------
	Position q, tmp;
	int tmp_element = 0;

	while (L1 != NULL && L2 != NULL)
	{
		if (L1->Element > L2->Element)
		{
			tmp_element = L1->Element;
			L1 = L1->Next;
		}
		else if (L1->Element < L2->Element)
		{
			tmp_element = L2->Element;
			L2 = L2->Next;
		}
		else
		{
			tmp_element = L1->Element;
			L1 = L1->Next;
			L2 = L2->Next;
		}

		q = (Position)malloc(sizeof(Cvor));
		if (q == NULL)
			printf("\r\nGreska!\r\nMemorija nije alocirana.");
		else
		{
			q->Element = tmp_element;
			q->Next = U->Next;
			U->Next = q;
			U = q;
		}
	}

	if (L1 == NULL)
		tmp = L2;
	else
		tmp = L1;

	while (tmp != NULL)
	{
		q = (Position)malloc(sizeof(Cvor));
		if (q == NULL)
			printf("\r\nGreska!\r\nMemorija nije alocirana.");
		else
		{
			q->Element = tmp->Element;

			q->Next = U->Next;
			U->Next = q;

			U = q;
		}
		tmp = tmp->Next;
	}
}
//-----------------------------


void uzimanjeSuglasnike(position head, position head2) { //----------------UZIMANJE SAMOGLASNIKA--------------------
	head = head->next;
	position temp = NULL;
	while (head != NULL) {
		if (imaSamoglasnika(head)==0 ) {
			temp = createNode();
			strcpy(temp->rijeci, head->rijeci);
			insert(head2, temp);
		}
		head = head->next;
	}
	printf("Samo sa suglasnicima rici:\n");
	printList(head2);
}

int imaSamoglasnika(position head) {
	char samoglasnici[5] = { 'a','e','i','o','u' };

	for (int i = 0;i < 5;i++) {
		if (tolower(head->rijeci[0]) == samoglasnici[i])
			return 1;
	}
	return 0;
}
//-------------------------------------------------