Thread: segmentation error

hey guys..
am having problems reading a file into a linked list.. i am getting a segmentation error .. this is my code

Code:

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


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

typedef struct listnode LISTNODE ;
void print(LISTNODE);
void read(LISTNODE *, FILE*);

main()
{
  FILE *fptr;
  char filename[255];
  LISTNODE *node;
printf("enter filename\n");
  scanf ("%s",filename);
  fptr = fopen(filename,"r");

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

read(node ,fptr);

fclose(fptr);
}


 void read(LISTNODE *node,FILE *fptr )
  {
    LISTNODE *Curr;
    Curr = node;

    do
      { fscanf(fptr, "%d %d %d", &(Curr->data1), &(Curr->data2), &(Curr->cost));
printf("ssss\n");     // i used this on each line to test wer the error was..so im  thinking             i t                          has to do with fscanf 
if (!feof (fptr))
        {
           Curr->nextPtr = malloc(sizeof(LISTNODE));
           Curr = Curr->nextPtr;
        }

 else
   {
     Curr->nextPtr = NULL;
   }
   }while (!feof(fptr));
   }

i tried using dbg.. and i get a breakpoint at enter filename..what does that mean ?
any help would very much be appreciated

hey thanx guys .. its working now
i allocated memory for Curr