C - Accessing struct within a struct

Question

I was doing a project in C.And I am quite new to C. In the project, I have a struct like this :

struct room_t{
   char* name;
   struct room_t* north;
   struct room_t* east;
   struct room_t* south;
   struct room_t* west;
}

declared as : struct room_t room[3]

If I want to access the name in north, I do this :room[0].north[0]->name

Am I right ? or should it be room[0].north[0].name

the irst one is correct, since the fields (or properties) are pointers. well, it never hurt to give a shot. — Bagus Tesa
– Bagus Tesa, Commented Apr 29, 2017 at 13:12
It's a matter of type, just try it, one will compile and one will not. Though it would be poor form, assuming memory is correctly allocated, the "imo most readable" way would be room[0].north->name — George
– George, Commented Apr 29, 2017 at 13:15
There are no structs in your struct! What is unclear about dereferencing a pointer? — too honest for this site
– too honest for this site, Commented Apr 29, 2017 at 13:40

haltode · Accepted Answer · 2017-04-29 13:15:07Z

6

Your first guess is almost correct, but it should be room[0].north->name since you didn't declare an array for the variable north.

In general, you should give it a try and then see what outputs the compiler and your progam to learn as much as possible by yourself. ;)

answered Apr 29, 2017 at 13:15

haltode

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Pras · Accepted Answer · 2017-04-29 13:16:15Z

4

It should be room[0].north->name, if you allocate single element in north But if you allocate an array(more than one element) into north, you should access as room[0].north[n].name where n=0 to (number of elements allocated) - 1

answered Apr 29, 2017 at 13:16

Pras

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