0001 template <typename T> void List<T>::init() { //列表初始化,在创建列表对象时统一调用 0002 header = new ListNode<T>; trailer = new ListNode<T>; //创建头、尾哨兵节点 0003 header->succ = trailer; header->pred = NULL; //向前链接 0004 trailer->pred = header; trailer->succ = NULL; //向后链接 0005 _size = 0; //记录规模 0006 }