/d/obj/books-nonskill/book-qujing.c line 7: Cannot #include /d/qujing/obstacle.h
  int do_read(string arg)
  ^
/d/obj/books-nonskill/book-qujing.c line 34: Undefined variable 'obstacles'
  int size = sizeof(obstacles)
                                ^
/d/obj/books-nonskill/book-qujing.c line 7: Cannot #include /d/qujing/obstacle.h
  int do_read(string arg)
  ^
/d/obj/books-nonskill/book-qujing.c line 34: Undefined variable 'obstacles'
  int size = sizeof(obstacles)
                                ^
/d/city/npc/bing.c line 6: Cannot #include greeting.h
  void create(
  ^
/d/city/npc/bing.c line 42: Undefined function greeting1
  greeting1(this_player())
                                    ^
/d/obj/books-nonskill/book-qujing.c line 7: Cannot #include /d/qujing/obstacle.h
  int do_read(string arg)
  ^
/d/obj/books-nonskill/book-qujing.c line 34: Undefined variable 'obstacles'
  int size = sizeof(obstacles)
                                ^
