引用型操作： ListEmpty(L) ListLength(L) GetElem(L,i,&e) 2 LocateElem(L,e,compare()) PriorElem(L,cur_e,&pre_e NextElem(L,cur e,&next e ListTraverse(L,visit())ListEmpty( L ) ListLength( L ) PriorElem( L, cur_e, &pre_e ) NextElem( L, cur_e, &next_e ) ListTraverse(L, visit( )) 引用型操作: GetElem( L, i, &e ) LocateElem( L, e, compare( ) )