public T PopBack()
{
if (Empty)
{
throw new Exception("Queue empty.");
}
LinkedElement <T> temp = first;
while (temp.getParent() != last)
{
if (temp.getParent() == null)
{
last = null;
first = null;
return(temp.valor);
}
temp = temp.getParent();
}
temp.setParent(null);
LinkedElement <T> temp2 = last;
last = temp;
return(temp2.valor);
}
public T Pop()
{
if (Empty)
{
throw new Exception("Stack empty.");
}
LinkedElement <T> temp = top;
top = top.getParent();
return(temp.valor);
}
public T leave()
{
if (Empty)
{
throw new Exception("Queue empty.");
}
LinkedElement <T> temp = first;
first = first.getParent();
return(temp.valor);
}
public T PopFront()
{
if (Empty)
{
throw new Exception("Queue empty.");
}
LinkedElement <T> temp = first;
first = first.getParent();
if (first == null)
{
last = null;
}
return(temp.valor);
}
