Linked List to Array - Force Porquillo

#include <iostream>
#include <conio.h>
#include <sstream>
using namespace std;

struct Node{
    int data;
    Node* next;

};

Node *head = NULL;
Node *tail = NULL;

void exitMessage(){
    system("cls");
    cout << "Programmed by: Aljan A. Porquillo\n"
         << "FEU - Insitute of Technology\n"
         << "BS Computer Science with Specialization in Software Engineering\n"
         << "Last compiled: 06 - 02 - 2019\n" << endl;
}

void addList(int val){
    Node* node = new Node;
    node -> data = val;
    node -> next = NULL;

    if(head == NULL){
        head = tail = node;
    }else{
        tail -> next = node;
        tail = node;
    }
}

void traverseList(){
    Node *node = head;

    cout << "\nLinked list: ";
    while(node != NULL){
        cout << node -> data << " ";
        node = node -> next;
    }
}

void list_Arr(){
    Node* node = head;

    static int counter = 0;
    int *arr = new int[counter];

    while(node != NULL){
        arr[counter] = node -> data;
        node = node -> next;
        counter++;
    }

    delete node;
    node = NULL;

    cout << "\nArray List: ";
    for(int i = 0; i < counter; i++){
        cout << arr[i] << " ";
    }

    cout << endl;

    delete [] arr;
    arr = NULL;

}

int main(){
    static int c = 1;
    string x;
    int num;

    cout << "Linked list to Array\n";
    cout << "Enter [~] to stop inputing values. Do you understand? [Y/N]: ";
    getch();

    if(getch() == 'y'){
        system("cls");
        while(x != "~"){
            cout << "Enter value #" << c++ << ": ";
            cin >> x;

            if(x == "~"){
                break;
            }else{
                istringstream(x) >> num;
                addList(num);
            }
        }
    }else if(getch() == 'n'){
        exit;
    }else{
        system("cls");
        main();
    }

    traverseList();
        list_Arr();

        cout << "\nPress [X] to exit" << endl;
        getch();

        if(getch() == 'x'){
            exitMessage();
            system("pause");
        }
}