Thread: problem with segmentation fault

Hi..everyone..i had trying to solve this problem but i really can't because i don't have any experience with C core dumped.Below is a program that can be compile but after exceution i get Segmentation fault (core dumped) with gcc (cygwin) compiler. Can anyone give me some piece of advice or tips.Thanks alot.

Code:

typedef struct bookStruct
{
   int id;
   char title[TITLE_LEN + 1];
   char author[AUTHOR_LEN + 1];
   int year;
   float price;
   int count;
   struct bookStruct* next;
} BookType;

typedef struct bookListStruct
{
   BookType* head;
   int count;
} BookListType;

BookType *b;
 
/* Function prototypes. */

void loadData(BookListType*, char*);
void displayBooks(BookListType*);

//int main(void)
int main(int argc, char *argv[])
{
 BookListType* booklist;
 int i;
 FILE *bookRead;
 char line[LINESIZE] , *word;
 
 if ( argc != 2 ) 
 {
    fprintf ( stderr, "Usage: %s <readfile1>\n", argv[0] );
    exit ( EXIT_FAILURE );
 }
  if((bookRead = fopen( argv[1], "r" )) == NULL)
 {
  fprintf(stderr, "cat: can't open %s\n", argv[1]);
 }
  
  loadData(booklist, argv[1]);
  displayBooks(booklist);
  fclose ( bookRead );
  return EXIT_SUCCESS;
}

void loadData(BookListType* booklist, char* booksFile)
{   
   char *delimeter = ":";
   char  *token, *bookPtr;
   char bookWord[100];
   BookType *b;
   FILE *bfile;
	/* fopen opens the file; exits if file cannot be opened */
	
	if ( ( bfile = fopen( booksFile, "r" ) ) == NULL ) 
	{
		fprintf(stderr,"***> Open error reading input file %s", booksFile);
		exit(-1);
	} 
	/* read all records from file (until eof) */
	while(!feof(bfile))
	{
	  while (bookPtr != NULL)
	   {
        if(fgets(bookWord,sizeof(bookWord),bfile)!=NULL) 
        {
 	      if (b = (BookType*)malloc(sizeof(BookType)))
           {   
            /*	copy the data from BookType to linked list	*/ 
            bookPtr = strtok(bookWord,delimeter);
            b->id=atoi(bookPtr);
		    strcpy(b->title, bookPtr);
		    strcpy(b->author, bookPtr);
		    b->year = atoi(bookPtr);
		    b->price = atof(bookPtr);
		    b->count = atoi(bookPtr);
            }
            bookPtr = strtok(NULL, delimeter);
         }    
            b->next = booklist->head;
            booklist->head = b;
            booklist->count++;       
	     }
        }
	fclose(bfile);
}
void displayBooks(BookListType* booklist)
{
     printf("ID  Title\t\t\t    Author\t Year\tPrice\tCount\n");
	printf("--  -----------------------------   ------------ ----\t-------\t-----\n");

	while(booklist->head!=NULL)
	{
		printf("%2d  %-32s%-12s%6d\t%2c%5.2f\t%4d\n", booklist->head->id,
			booklist->head->title, booklist->head->author, booklist->head->year,'$', 
			booklist->head->price,booklist->head->count);
		booklist->head = booklist->head->next;
	}
}