// (C) Porkolab 2003 // // A.4.4. // // Creation of subobjects class list { public: list(); ~list(); // ... private: // this order is the relevant: int id; list *next; list *prev; }; // will be automatically rearranged: id(nid), next(0), prev(0) list::list() : id(nid), prev(0), next(0) { ++nid; }