Question

I’m learning how to implement linked lists in C. I understand the basics of normal linked lists, how to add values, how to print them etc. but I’ve been wondering – is it possible to add other structure as a value in linked list? What I mean is:

typedef struct personal_info {
  char *name;
  char *surname;
  int phone_number;
} Info;

typedef struct llist {
  Info *info;
  struct llist *next;
} List;

And when I do this, how do I access the values of the Info structure?

List *l;
l = malloc(sizeof(List));

l->info->name = 'name';
l->info->surname = 'surname';
l->info->phone_number = 1234567890;

The code crashes, so I’m definitely doing something wrong. Could you give me some tips how to achieve that?

Answer 1

You also need to allocate memory for the info struct:

l = malloc(sizeof(List));
l->info = malloc(sizeof(Info));

l->info->name = "name";
l->info->surname = "surname";
l->info->phone_number = 1234567890;