Code for the push_back() Function

     //-----------------------------------------------------
    // push_back
    //
    // Insert the specified item at the end of the list.
    //
    // In Parameter: item
    //-----------------------------------------------------
    void push_back(const itemType& item)
    {
        node* temp;
        node* ptr;
        
        try
        {
            ptr = new node;
            ptr->info = item;
            ptr->next = NULL;
            
            if (head == NULL)
            {
                head = ptr;
            }
            else
            {
                temp = head;
                while (temp->next != NULL)
                {
                    temp = temp->next;
                }
                temp->next = ptr;
            }
            
            n++;
        }
        catch (bad_alloc bae)
        {
            cout << "Memory Allocation Failure (" << bae.what() << ")\n\n";
            exit(0);
        }
    }