Числа в динамическом списке (Стек)

#include <iostream>

using namespace std;

struct Node
{
    int num;
    Node *link;
};

void print(Node *top)
{
    Node *work = top;
    while (work != NULL)
    {
        cout << work->num << ' ';
        work = work->link;
    }
    cout << endl;
}

int numOfElem(Node *top)
{
    Node *work = top;
    int i = 0;
    while (work != NULL)
    {
        if (work->num != 0 && work->num % 3 == 0)
            i++;
        work = work->link;
    }
    return i;
}

int main()
{
    Node *top = NULL, *work;
    int temp;

    cout << "Input numbers(ctrl+z = exit): ";
    while (cin >> temp)
    {
        work = new Node;
        work->link = top;
        work->num = temp;
        top = work;
    }

    cout << "Numbers: ";
    print(top);

    int elem = numOfElem(top);
    work = new Node;
    work->link = top;
    work->num = elem;
    top = work;

    cout << "New numbers: ";
    print(top);

    return 0;
}