Nonvirtual member functions

• int num(void) - return number of items in the list.
• int is_current(void) - returns a flag indicating if there is a current item, or if the current item is 'undefined'.
• append(const T&) - appends the given item to the end of the list. A copy of the item of type T is made.
• remove(void) - removes the current item (does nothing if there is no current item).
• T current(void) - returns a copy of the current item.
• T item(int) - returns a copy of the Nth item.
• T get(void) - returns a copy of the current item, and advances the current item pointer to the next item.
• next(void) - advance the current item pointer.
• prev(void) - move back the current item pointer.
• set(int) - make the Nth item the current item.
• int find(const T&) - change the current item to be the first one which matches the argument, or does nothing if no items match. Returns TRUE if a match was found.
• reset(void) - set the current item to be the first one.
• clear(void) - set the current item pointer to be NULL, i.e. so that is_current() will return FALSE.