// Method03:移除当前所在节点
public void Remove()
{
if (this.tail == null)
{
throw new NullReferenceException("链表中没有任何元素");
}
else if (this.count == 1)
{
// 只有一个元素时将两个指针置为空
this.tail = null;
this.currentPrev = null;
}
else
{
if (this.currentPrev.Next == this.tail)
{
// 当删除的是尾指针所指向的节点时
this.tail = this.currentPrev;
}
// 移除当前节点
this.currentPrev.Next = this.currentPrev.Next.Next;
}
this.count--;
}
// Method02:在尾节点后插入新节点
public void Add(T value)
{
CirNode <T> newNode = new CirNode <T>(value);
if (this.tail == null)
{
// 如果链表当前为空则新元素既是尾头结点也是头结点
this.tail = newNode;
this.tail.Next = newNode;
this.currentPrev = newNode;
}
else
{
// 插入到链表末尾处
newNode.Next = this.tail.Next;
this.tail.Next = newNode;
// 改变当前节点
if (this.currentPrev == this.tail)
{
this.currentPrev = newNode;
}
// 重新指向新的尾节点
this.tail = newNode;
}
this.count++;
}
// Method05:让当前节点向前移动指定步数
public void Move(int step = 1)
{
if (step < 1)
{
throw new ArgumentOutOfRangeException("step", "移动步数不能小于1");
}
for (int i = 1; i < step; i++)
{
currentPrev = currentPrev.Next;
}
}
// Method01:根据索引获取节点
private CirNode <T> GetNodeByIndex(int index)
{
if (index < 0 || index >= this.count)
{
throw new ArgumentOutOfRangeException("index", "索引超出范围");
}
CirNode <T> tempNode = this.tail.Next;
for (int i = 0; i < index; i++)
{
tempNode = tempNode.Next;
}
return(tempNode);
}
// Method04:获取所有节点信息
public string GetAllNodes()
{
if (this.count == 0)
{
throw new NullReferenceException("链表中没有任何元素");
}
else
{
CirNode <T> tempNode = this.tail.Next;
string result = string.Empty;
for (int i = 0; i < this.count; i++)
{
result += tempNode.Item + " ";
tempNode = tempNode.Next;
}
return(result);
}
}
public MyCircularLinkedList()
{
this.count = 0;
this.tail = null;
}
