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數據結構與算法(C#實現)系列---N叉樹(一)

編輯：關於C語言

N叉樹的每一節點度數都相同，為N

using System;

using System.Collections;

namespace DataStructure

{

/// <summary>

/// NaryTree 的摘要說明。-----N叉樹

/// </summary>

public class NaryTree:Tree

{

// member variables

protected object key;

protected uint degree;

protected ArrayList treeList=new ArrayList();

//protected uint height=0;//暫時默認為0

//create an empty tree whose attribute of degree is _degree

public NaryTree(uint _degree)

{

//

// TODO: 在此處添加構造函數邏輯

//

this.key=null;

this.degree=_degree;

this.treeList=null;

}

//構造一棵葉子結點的N叉樹

public NaryTree(uint _degree,object _key)

{

this.key=_key;

this.degree=_degree;

this.treeList=new ArrayList();

this.treeList.Capacity=(int)_degree;

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

{

this.treeList.Add( this.GetEmptyInstance(_degree) );

}

}

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

protected virtual object GetEmptyInstance(uint _degree)

{ return new NaryTree(_degree); }

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

//judge whether the tree is an empty tree

public override bool IsEmpty()

{ return this.key==null; }

//判定是否是葉子結點。如果即不是空樹且每一棵子樹均為空樹，則為葉子結點

public override bool IsLeaf()

{

if(IsEmpty())

return false;

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

{

if( !(this[i].IsEmpty()) )

return false;

}

return true;

}

//-----------------------------------Inherited Attributes---------------------------------

public override object Key

{

get

{

return this.key;

}

}

//索引器

public override Tree this[uint _index]

{

get

{

if( _index>=this.degree )

throw new Exception("My:out of index!");//如果出界，則拋出異常

if( this.IsEmpty() )

return null;//如果是空樹，則索引器返回一個 null

return (Tree)this.treeList[(int)_index];

}

set

{

this.treeList[(int)_index]=value;

}

}