Thread: Creating Doubly Linked List Help!!

Hey Everyone,

I'm having trouble with my code. It compiles fine, but when I try to run it, I get an error.

Insight: I'm trying to read numbers in from a FILE and put those numbers into the doubly linked list.

Code:

   void CreateList(struct node *lnode, int m, FILE *fp1){
   	
      struct node *head, *tail;
		
      fscanf(fp1, "%d", &m);
   
      while(!feof(fp1)){
	
	 lnode = (struct node *)malloc(sizeof(struct node));
 
         lnode->data = m;
			
         if(head == NULL)
         {
            head = lnode;
            lnode->back = NULL;
         } 
         else {
            tail->next = lnode;
            lnode->back = tail;
         }
      
         tail = lnode;
         lnode->next = NULL;

         fscanf(fp1, "%d", &m);
      }
    	
   }

6. head and tail are used without initialization.