数据结构与算法(C#实现)系列---N叉树(二)

数据结构与算法(C#实现)系列---N叉树(二)

Heavenkiller(原创)

public override uint Degree

{

get

{

return this.degree;

}

}

//-------------------------------------------------------------------------------------

//只用于空树结点

public virtual void AttachKey(object _obj)

{

if(!IsEmpty())

throw new Exception("My:this node must be a empty tree node!");

this.key=_obj;

this.treeList=new ArrayList();//产生一个degree长的数组,并将其初始化为空树

this.treeList.Capacity=(int)this.degree;

for(int i=0;i<this.degree;i++)

{

treeList.Add(new NaryTree(this.degree));

}

/*

foreach(object tmpObj in this.treeList)

{

tmpObj=new NaryTree(this.degree);

}

*/

}

//只用于叶子结点，将叶子结点变为一个空结点，并返回叶子结点关键字的引用

public virtual object DetachKey()

{

if(!IsLeaf())

throw new Exception("My:this node must be a leaf node!");

object result=this.key;//store this leaf node temporary

this.key=null;

this.treeList=null;

return result;

}

//将子树连接到指定树的第num个结点上，前提是这个结点必须是空结点,并且度数相同，否则抛出异常

public virtual void AttachSubtree(uint num,NaryTree _naryTree)

{

if(this.IsEmpty())

throw new Exception("My:it can't be a empty tree!");

if(!(this[num-1].IsEmpty()) | this.degree!=_naryTree.degree )

throw new Exception("My:this[i-1] must be empty and they should have the same degree!");

this[num-1]=_naryTree;

}

//仅为非空树定义，从给定树中删去它的第i棵子树并连上一个空树,度数相同，并且返回删除的子树引用

public virtual NaryTree DetachSubtree(uint num)

{

if (IsEmpty())

throw new Exception("My:it can't be empty! ");

NaryTree tmpTree=this;

((NaryTree)this[num-1]).key=null;

((NaryTree)this[num-1]).treeList=null;

return this;

}

//----------------------------------------------------------------------------------

}

}