public BalancedSearchTree(int[] exampleData)
{
this.addStatue = exampleData;
this.balFactor = 0;
this.LChild = null;
this.RChild = null;
}
//中序遍历树
public void middle(BalancedSearchTree T, StreamWriter sw)
{
if (T == null)
{
return;
}
middle(T.LChild, sw);
//Console.WriteLine(T.addStatue[0]);
sw.WriteLine(T.addStatue[0] + "饕" + T.addStatue[1] + "饕" + T.addStatue[2]);
middle(T.RChild, sw);
}
//左旋操作,与右旋对称，不再画图了……
private void LeftRotate(BalancedSearchTree T)
{
BalancedSearchTree RightKid;
int[] t;
RightKid = T.RChild;
T.RChild = RightKid.RChild;
RightKid.RChild = RightKid.LChild;
RightKid.LChild = T.LChild;
T.LChild = RightKid;
t = T.addStatue; T.addStatue = RightKid.addStatue; RightKid.addStatue = t;
}
//右旋操作
private void RightRotate(BalancedSearchTree T)
{
BalancedSearchTree LeftKid;
int[] t; // T LeftKid
LeftKid = T.LChild; // / \ / \
T.LChild = LeftKid.LChild; // LeftKid TR LL T
LeftKid.LChild = LeftKid.RChild; // / \ => / \
LeftKid.RChild = T.RChild; // LL LR LR TR
T.RChild = LeftKid; //
t = T.addStatue;
T.addStatue = LeftKid.addStatue;
LeftKid.addStatue = t;
}
// 左平衡
private void LeftBalance(BalancedSearchTree T)
{
BalancedSearchTree LeftSubTree, LChildRightSubTree;
LeftSubTree = T.LChild;
switch (LeftSubTree.balFactor)
{
case BalanceStatue.leftHigher: // T左孩子的左子树高了，作右旋处理
T.balFactor = BalanceStatue.equalHigh;
LeftSubTree.balFactor = BalanceStatue.equalHigh;
RightRotate(T);
break;
case BalanceStatue.rightHigher://T左孩子的右子树高了，作双旋处理（因为每次都会及时处理掉，所以这是最底端的情况）
LChildRightSubTree = LeftSubTree.RChild;
switch (LChildRightSubTree.balFactor)
{
case BalanceStatue.leftHigher:// T左孩子的右孩子的左子树高了
T.balFactor = BalanceStatue.rightHigher;
LeftSubTree.balFactor = BalanceStatue.equalHigh;
break;
case BalanceStatue.equalHigh:
T.balFactor = BalanceStatue.equalHigh;
LeftSubTree.balFactor = BalanceStatue.equalHigh;
break;
case BalanceStatue.rightHigher:
T.balFactor = BalanceStatue.equalHigh;
LeftSubTree.balFactor = BalanceStatue.leftHigher;
break;
}
LChildRightSubTree.balFactor = BalanceStatue.equalHigh; //平衡过后T左孩子的右孩子恢复平衡
LeftRotate(T.LChild); //继续向上平衡
RightRotate(T); ////继续向上平衡
break;
}
}
// 右平衡，与左平衡对称，不再累述。
private void RightBalance(BalancedSearchTree T)
{
BalancedSearchTree RightSubTree, RChildLeftSubTree;
RightSubTree = T.RChild;
switch (RightSubTree.balFactor)
{
case BalanceStatue.rightHigher:
T.balFactor = BalanceStatue.equalHigh;
RightSubTree.balFactor = BalanceStatue.equalHigh;
LeftRotate(T);
break;
case BalanceStatue.leftHigher:
RChildLeftSubTree = RightSubTree.LChild;
switch (RChildLeftSubTree.balFactor)
{
case BalanceStatue.rightHigher:
T.balFactor = BalanceStatue.leftHigher;
RightSubTree.balFactor = BalanceStatue.equalHigh;
break;
case BalanceStatue.equalHigh:
T.balFactor = BalanceStatue.equalHigh;
RightSubTree.balFactor = BalanceStatue.equalHigh;
break;
case BalanceStatue.leftHigher:
T.balFactor = BalanceStatue.equalHigh;
RightSubTree.balFactor = BalanceStatue.rightHigher;
break;
}
RChildLeftSubTree.balFactor = BalanceStatue.equalHigh;
RightRotate(T.RChild);
LeftRotate(T);
break;
}
}
public int[] Search(BalancedSearchTree T, int data)
{
if (T == null)
{
isIn = new int[] { data, 0, 1 };
return(new int[] { data, 0, 1 });
}
else if (data == T.addStatue[0] && T.addStatue[1] == 1)
{
isIn = new int[] { T.addStatue[0], 1, T.addStatue[2] };
++T.addStatue[2];
return(new int[] { T.addStatue[0], 1, T.addStatue[2] });
}
else if (data == T.addStatue[0] && T.addStatue[1] == 0)
{
isIn = new int[] { T.addStatue[0], 0, T.addStatue[2] };
++T.addStatue[2];
return(new int[] { T.addStatue[0], 0, T.addStatue[2] });
}
else if (data < T.addStatue[0])
{
isIn = T.Search(T.LChild, data);
}
else if (data > T.addStatue[0])
{
isIn = T.Search(T.RChild, data);
}
if (isIn[1] == 1)
{
return(new int[] { data, isIn[1], isIn[2] });
}
else
{
return(new int[] { data, 0, 1 });
}
}
public Boolean insertTree(BalancedSearchTree T, int[] keyData)
{
//创建树根######################################################################################
if (this.head)
{
T.addStatue = keyData;
this.taller = true;
this.head = false;
}
//遍历到叶子的时候#############################################################################
else if (T == null)
{
if (leftChildRecord)
{ //上次记录是左孩子的话
Parent.LChild = new BalancedSearchTree(keyData);
Parent.LChild.Parent = Parent;
}
else
{ //否即是右孩子
Parent.RChild = new BalancedSearchTree(keyData);
Parent.RChild.Parent = Parent;
}
this.taller = true;
}
//树枝的情况##################################################################################
else
{
if (T.addStatue[0].Equals(keyData))
{// 已有就不再录入了
this.taller = false;
return(false);
}
else if (keyData[0] < T.addStatue[0])
{
//将从T的左子树进行搜索，先进行记录
Parent = T;
leftChildRecord = true;
if (insertTree(T.LChild, keyData) == false)
{
//没有插入
return(false);
}
else if (this.taller)
{
switch (T.balFactor)
{ //检查T的平衡度
case BalanceStatue.leftHigher: //原来的左子树就已经比右子树高，需左平衡
LeftBalance(T);
this.taller = false;
break;
case BalanceStatue.equalHigh: //原来等高
T.balFactor = BalanceStatue.leftHigher; //现在左子树增高了一层
this.taller = true;
break;
case BalanceStatue.rightHigher: //原来右子树比左子树高
T.balFactor = BalanceStatue.equalHigh; //现在等高
this.taller = false;
break;
}
}
}
else
{// 即 keyData.compareTo(T.data) > 0，与上边情况对称，不再作注释。
Parent = T;
leftChildRecord = false;
if (insertTree(T.RChild, keyData) == false)
{
return(false);
}
else if (this.taller)
{
switch (T.balFactor)
{
case BalanceStatue.leftHigher:
T.balFactor = BalanceStatue.equalHigh;
this.taller = false;
break;
case BalanceStatue.equalHigh:
T.balFactor = BalanceStatue.rightHigher;
this.taller = true;
break;
case BalanceStatue.rightHigher:
RightBalance(T);
this.taller = false;
break;
}
}
}
}
return(true);
}