linked list problem

[akono]

hey guys

am trying to build a linked list that reads info from a text file into the list.
but i get an error saying ..request for member nextPtr in something not a structure or union..

this is my code ..

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


struct listnode
{
 int data1;
 int data2;
 int weight;
 struct listnode *nextPtr;
};

typedef struct listnode LISTNODE ;
typedef LISTNODE *NodePtr;
NodePtr insert(NodePtr *, int ,int , int);
void print(NodePtr);
NodePtr createNode (NodePtr *, int, int, int);
main()
{
  FILE *fptr;
  char filename[255];
  NodePtr node = NULL;
  int d1,d2,d3;
printf("enter filename\n");
  scanf ("%s",filename);
printf("%s\n",filename);
  fptr = fopen(filename,"r");

  if (fptr == NULL)
        {
      printf ("file cannot be found");
      exit(0);
        }

while (!feof(fptr))
     {

    fscanf (fptr, "%d %d %d", &d1,&d2,&d3);

    insert(&node , d1,d2,d3 );

    print(node);
      }
fclose(fptr);
}

  NodePtr createNode (NodePtr *anode ,int value1,int value2,int value3)
   {
     NodePtr node;

     node  = malloc(sizeof(LISTNODE));

     node->data1 = value1;
     node->data2 = value2;
     node->weight = value3;
     node->nextPtr = NULL;
     return node;
  }
NodePtr insertnew(NodePtr *node, int value1, int value2, int value3 )
  {
    NodePtr newNode ;

    newNode = createNode(&newNode,value1,value2,value3);


     newNode->nextPtr = node->nextPtr;  ( AM GETTING THE ERROR.....
     node->nextPtr = newNode;                      ON THESE 2 LINES ) 
     return newNode;
     }


void print(NodePtr newNode)
   {
     if( newNode == NULL)
          printf("List is empty\n\n");
     else {
         printf("The List is:\n");
     while (newNode != NULL )
          {
          printf ("%d %d %d --->", newNode->data1, newNode->data2, newNode->weight);
          newNode = newNode->nextPtr;
          }
           printf("NULL\n\n");
          }
    }

can anyone please help me out here..it has been bugging my brains out..
any help would be much appreciated

[cas]

node is a pointer to a pointer to a struct, not a pointer to a struct. The typedefing of a pointer makes this somewhat obscured, which is why I'd recommend not doing that. Instead, you would have something like:

struct node *insert(struct node **node, int val);

This way it's very clear what the various types are.

The solution is the same, in either case: use something like (*node)->next = blah, although for your program I see no reason why you'd pass in a pointer to a pointer.

[akono]

ok thanx for the input cas... i have changed the code and no longer use insert... but now am getting a segmentation error.. i have posted a seperate thread for that..i am thinking its my fscanf or something..

ur help wud be much appreciated .

[c.user]

NodePtr insert(NodePtr *, int ,int , int);

NodePtr insertnew(NodePtr *node, int value1, int value2, int value3 )
{