/** Pops off the top item from stack */
public override object Pop()
{
if (IsEmpty()) throw new EmptyStackException("Nothing in LLStack. ");
Node temp = top;
if (top.next != null)
{top = top.next;}
else
top = bot = null;
temp.next = null;
return temp;
}
/** Stores an item on the top of the stack. */
public override void Push(object item)
{
Node newItem = WrapObject(item);
Node temp = null;
if (IsEmpty()) {top = bot = newItem; }
else
{
temp = top;
top = newItem;
top.next = temp;
}
}
public Node(){
this.data = null;
this.next = null;
}
public LLStack(){
top = null;
bot = null;
}
public void ClearLink(){
this.next = null;
}
