Question

I’ve already gone through a bunch of threads on hear and a bunch of others I found on Google. I still can’t seem to get this right.

//Room.h
#ifndef ROOM_H
#define ROOM_H

#include "Door.h"

typedef struct {
   Door* doors[3];

} Room;

#endif

//Door.h
#ifndef DOOR_H
#define DOOR_H

#include "Room.h"

typedef struct {
   Room* room1;
   Room* room2;
} Door;

//main.c
#include <stdio.h>
#include "Room.h"
int main() { ... }

I already tried adding this to the top of Door.h

typedef struct Room room1;
//typedef struct Room* room1;
//typedef stuct Room;
//typedef struct Room*;

All gave me this error:

“unknown type name ‘Room’”

I want to keep these structs separate header files.

Answer 1

C-way of struct reference:

room.h

typedef struct Room_s {
  struct Door_s * doors[3];
} Room_t;

door.h

typedef struct Door_s {
  struct Room_s *room1;
  struct Room_s *room2;
} Door_t;