Me playing arround with linked lists and other stuff

FunWithMemory.cpp

#include <iostream>
using namespace std;

// Note: I was a bit tired wrapping this up, so I could use a bit more code comments
// And I didn't clean up a few things to have "proper coding style", normally mixing
// variables beginning with capitals and what not

// Note2 (Wrotten after it was uploaded): it looks like I was dynamically adding nodes to the
// linked list wrong, they should be added at the head, not the tail.
// Also, I'll work on being consistent on my code style in next ones, I'll just leave things here
// as is

// Define Node struct
struct node {
    int data = 0;
    node* next = NULL;
    node(){};
    node(int info, node* linked=NULL): data(info), next(linked) {};
};

// Function prototype
void deleteLinkedLists(node* deleteThis);

int main() {
    // Declare LinkedList head & LinkedList
    node* const LinkedListHead = new node(423, new node(191, new node(9003, new node(44))));
    node* LinkedList = LinkedListHead;

    // Print each node's data
    while (LinkedList != NULL) {
        cout << LinkedList->data << ' ';
        LinkedList = LinkedList->next;
    } cout << endl;

    // This is fun
    cout << LinkedListHead->next->next->data << endl;

    // Create a const array of five linkedlist pointers
    node** const graph = new node* [5];
 
    // Initialize each linked list
    for (int i=0; i != 5; ++i) {
        graph[i] = new node(7); }

    // Create some data for the linked list
    graph[0]->next = new node(5, graph[3]);
    graph[3]->data = 9999;

    // Same as cout << graph[3]->data << endl;
    cout << graph[0]->next->next->data << endl;

    // Delete earlier linked list
    LinkedList = LinkedListHead;
    deleteLinkedLists(LinkedList);

    // Delete graph
    for (int i=0; i < 5; ++i) {
        deleteLinkedLists(graph[i]);
    }

    // Pause
    cout << "Press enter"; cin.ignore();
}

// Utility function for deleting linked lists
void deleteLinkedLists(node* deleteThis) {
    node* tracker;
    do {
        tracker = deleteThis->next;
        delete deleteThis;
        deleteThis = NULL;
        deleteThis = tracker;
    } while (deleteThis != NULL);
}