单向链表反转

linkList reverse(linkList head){
  linkList p,q,pr;
  p = head->next;
  q = NULL;
  head->next = NULL;
  while(p){
    pr = p->next;
    p->next = q;
    q = p;
    p = pr;
  }
  head->next = q;
  return head;
}

https://blog.csdn.net/blioo/article/details/62050967