求改 ..谢谢

int n;
struct list * creat(void)
{
     struct list * head;
     struct list * p1,* p2;
     int i;
     head=(struct list *)malloc(LEN);
     scanf("%d",&n);
     head->next=NULL;
     p2=head;
     for(i=0;i<n;i++)
     {
         p1=(struct list *)malloc(LEN);
         scanf("%d",&p1->num);
             p1->next=NULL;
         p2->next=p1;
         p2=p1;
     }
     return head;
}
void print(struct list * head)
{
     struct list * p;
     p=head;
     if(head!=NULL)
         do
         {
             printf("%d ",p->num);
             p=p->next;
         }while(p!=NULL);
         printf("\n");
}