N叉树

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;ithis.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;
}

//———————————————————————————-

}
}