Node.cpp
#include "Node.h"

using namespace LinkedListOfClasses;

void head_insert(NodePtr &head, int the_number) {
    
    NodePtr temp_ptr;
    temp_ptr = new Node(the_number, head);
    head = temp_ptr;
    
}

Node::Node(int value, Node *next) {   
}

void Node::setData(int value) {
}

void Node::setLink(Node *next) {
}

Node.h
#include <iostream>
using namespace std;

namespace LinkedListOfClasses {
    class Node {
        
    public:
        Node();
        Node(int value, Node *next);
        int getData() const;
        Node *getLink() const;
        void setData(int value);
        void setLink(Node *next);
    private:
        int data;
        Node *link;
    };
    typedef Node* NodePtr;
}

main.cpp
#include <iostream>
#include "Node.h"
using namespace std;
using namespace LinkedListOfClasses;

void head_insert(NodePtr &head, int the_number) {
    
    NodePtr temp_ptr;
    temp_ptr = new Node(the_number, head);
    head = temp_ptr;
    
}

int main() {
    
    NodePtr head, temp;
    head = new Node(0, NULL);
    for (int i = 1; i < 5; i++) {
        head_insert(head, i);
    }
    temp = head;
    while (temp !=NULL) {
        cout << temp->getData() << endl;
        temp = temp->getLink();
    }
    temp = head;
    while (temp !=NULL) {
        NodePtr nodeToDelete = temp;
        temp = temp->getLink();
        delete nodeToDelete;
    }
    return 0;
}