来自AngelList测验的问题
3.这些结构中的哪一个不能用于单独构建堆栈？
树
放
大批
链表
7.给定一个反向链接列表的功能，这些行中的哪一行不是必需的？
public static Node reverseLinkedList( Node current) {
Node prev = null ;
Node next;
while (current != null ) {
next = current . next;
current . next = prev;
prev = current;
prev . next = current;
current = next;
}
return prev;
}
prev.next = current;
curre
