DoublyListNode.h+main.cpp

// DoublyListNode.h
#pragma once
template <class T > class DoublyList;
template<class T >
class DoublyListNode
{
    friend class DoublyList< T >; // Make Double List a friend
public:
    DoublyListNode( const T &);
    T getData() const;
private:
    T data;
    DoublyListNode< T > *nextPtr;
    DoublyListNode < T > *prePtr; // precede
}; // end class DoublyListNode constructor

template < class T >
DoublyListNode< T > :: DoublyListNode( const T &info) : data(info), nextPtr(NULL), prePtr(NULL)
{
    // empty body
} // end DoublyListNode constructor

template< class T >
T DoublyListNode< T > :: getData() const
{
    return data;
}


// main.cpp DoublyList

using namespace std;
#include "DoublyList.h"
#include "DoublyListNode.h"

int menu();

int main()
{
        //cout << "Hello World\n";
        DoublyList< int > integerList;

        int index = 1, opt;
        int value;

        do {
                opt = menu();
                switch(opt) {
                case 1:
                        cout << "Entre un numero: ";
                        cin >> value;
                        integerList.insert(1, value);
                        integerList.print();
                        break;
                case 2:
                        cout << "Final Enter a number: ";
                        cin >> value;
                        index = integerList.getLength();
                        integerList.insert(index+1, value);
                        integerList.print();
                        break;
                case 3:
                        cout << "Enter a number: ";
                        cin >> value;
                        cout << "Enter the index : ";
                        cin >> index;
                        integerList.insert(index, value);
                        integerList.print();
                        break;
                case 4:
                        cout << "Enter the index: ";
                        cin >> index;
                        integerList.remove(index);
                        integerList.print();
                        break;
                case 5:
                        cout << "View the content of the index: ";
                        cin >> index;
                        integerList.retrieve(index, value);
                        cout << "Index: " << index << "Value: " << value << endl;
                        integerList.print();
                        break;
                case 6:
                        integerList.print();
                        break;
                case 7:
                        DoublyList< int > newList( integerList);
                        cout << "Original List\n";
                        integerList.print();
                        cout << "New List\n";
                        newList.print();
                } // end switch

        } while( opt != 8);
        return 0;
} // end main

int menu()
{
        int opt;
        cout << "Main Menu\n";
        cout << "1.Add a node at the beginning of the list\n";
        cout << "2. Add a node at the end of the list\n";
        cout << "3.Add a node on the desired index of the list\n";
        cout << "4.Eliminate a node on the desired position\n";
        cout << "5.View the content of a node\n";
        cout << "6.Print List\n";
        cout << "7.Create another list aside from the one created\n";
        cout << "8.Exit Program\n";
        cout << "Enter an option:";
        cin >> opt;
        return opt;
} // end menu