Delete a item from linked list in c -

how can delete item linked list in c.

typedef struct {     int n;     struct item *nexi;  } item;   #define na 1000 int n, j; 

i have in main:

item * list[na];  n = 5;  for(j = 0; j < na; j++)     remove_elem(list, n, j); 

now function remove_elem:

void remove_elem(item * list[], int n, int pos) {     int i;     item * aux;     item * sec;       aux = list[pos]->nexi;      if(aux == null)         return;     else     {         sec = (item *)aux->nexi;          if(aux->n == n)         {         list[pos]->nexi = sec;             return;         free(aux);         }          while(sec != null)         {              if(sec->n == n)             {                 aux->nexi = sec->nexi;                 free(sec);                 return;             }         aux = (item *) aux->nexi;         sec = (item *) sec->nexi;         }     } 

}

but code giving me segmentation fault , cant notice why, can u figure i'm doing wrong here?

going strictly code, wager guess it's uninitialized pointers.

first when declare array of pointers, need initialize pointers null:

item * list[na] = { null }; 

then should check null pointers in functions:

void remove_elem(item * list[], int n, int pos) {     if (list[pos] == null)         return;      /* ... */ } 

and of course, when allocate new node put in list, of course have set nexi pointer null well, or checks if(aux == null) not work.