linked list display problem

[AmerJamil]

i'm beginner in C++,

please help me in display function to display the linked list of my following program

thanks

#include <iostream>
using namespace std;


template< class T >
class Lnode {
  public:
    T data;
    Lnode< T > *next;
};

template< class T >
class List {
  public:
    int  empty();
    void add( T data );
    T    remove();
    List() { 
      sentinel = new Lnode< T >(); 
      sentinel->next = sentinel; 
    }
	void display();
  private:
    Lnode< T >* sentinel;
};

template< class T >
void List< T >::display()
{
    Lnode< T > *q;
    cout<<endl;
    for(q=p;q!=NULL;q=q->next)
    cout<<" "<<q->data;
}

template< class T >
void List< T >::add( T data )
{
  Lnode< T > *p;

  p = new Lnode< T >();
  p->data = data;
  p->next = sentinel->next;
  sentinel->next = p;
}

template< class T >
T List< T >::remove()
{
  T data;
  Lnode< T > *node;

  if (sentinel->next == sentinel) {
    cerr << "ERROR: `remove' called with empty list.\n";
    exit(1);
  }

  node = sentinel->next;
  data = node->data;

  sentinel->next = node->next;
  delete node;

  return data;
}

main()
{
  List< int > list1;
  List< float > list2;
  List< char > list3;

  list1.add( 5 );
  list2.add( 2.7 );
  list3.add('c');



 cout<<list1.remove();
 cout<<list2.remove();
 cout<<list3.remove();

 
}

[WaltP]

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[Cross213]

But you are not calling the display function in your main, all you are doing is adding and removing

[AmerJamil]

when i call the display function in the main, i could nt able to display the linked list, please help

[Cross213]

You need a while loop, not a for loop

[mazzica1]

The problem is at the add function:

LNode toAdd;
toAdd.data=data;
if (sentinel== NULL)
	{
		sentinel= &toAdd;
	}
	else
	{
		LNode<T>* temp=sentinel;
		while(temp->Next!=NULL)
		{
			temp=temp->Next;
		}
		temp->Next=&toAdd;
	}