CObList::GetHeadPosition
Gets the position of the head element of this list.
POSITION GetHeadPosition( ) const;
Возвращаемое значение
A POSITION value that can be used for iteration or object pointer retrieval; NULL if the list is empty.
The following table shows other member functions that are similar to CObList::GetHeadPosition.
Class |
Member Function |
|---|---|
POSITION GetHeadPosition( ) const; |
|
POSITION GetHeadPosition( ) const; |
Пример
See CObList::CObList for a listing of the CAge class.
CObList list;
POSITION pos;
list.AddHead(new CAge(21));
list.AddHead(new CAge(40)); // List now contains (40, 21).
if ((pos = list.GetHeadPosition()) != NULL)
{
ASSERT(*(CAge*) list.GetAt(pos) == CAge(40));
}
Требования
Header: afxcoll.h