Trying to make linkedlist in C

Question

I am trying to make a struct in C that is a linked list. I am not really sure what is going wrong though. My errors are:

linked.c:6:2: error: unknown type name         


        

Answer 1

here's a corrected version of your program :

#include 
#include 


typedef struct linkedList
{
        int first;
        struct linkedList* rest; // add struct in the beginning 
} linkedList;

linkedList* addToList(linkedList* ll, int a);
void go_trough(linkedList *ll); // here's an extra function to check 

int main()
{
        linkedList *ll ; // working with a pointer is easier and makelist is pointless work with add to list instead
        ll = NULL; // initialize to NULL
        ll = addToList(ll, 7);
        ll = addToList(ll, 9);
    go_trough(ll);
        return 0;
}

linkedList* addToList(linkedList* ll, int a) // I didn't understand what you were trying to do so ... here's my version
{
     if(!ll)
     {
         ll = malloc(sizeof(linkedList*)); //allocating enought space to hold the structure
         ll->first = a;
         ll->rest = NULL;
     }
     else
         ll->rest = addToList(ll->rest , a);
     return ll;
}
void go_trough(linkedList *ll) 
{
     if(ll)
     {
         printf("%d\n" , ll->first);
         go_trough(ll->rest);
     }   
}