C#实现平衡二叉查找树
using System;using System.Collections;namespace DataStructure
{
/// <summary>
/// AVLTree 的摘要说明。-----平衡二叉查找树
/// </summary> public class AVLTree:BST { protected int height;//空树的高定义为-1; //构造一棵空的二叉查找树 public AVLTree():base() { // // TODO: 在此处添加构造函数逻辑 // height=-1; } public AVLTree(object _obj):base(_obj) { height=0; } //------------------------------------------------------------------ protected override object GetEmptyInstance(uint _degree) { return new AVLTree(); } //------------------------------------------------------------------ protected int BalanceFactor() { if (this.IsEmpty() ) return 0; return ((AVLTree)this.Left).height-((AVLTree)this.Right).height; } //调整高度 protected void AdjustHeight() { this.height=Math.Max( ((AVLTree)this.Left).height, ((AVLTree)this.Right).height)+1; } //平衡时的四种旋转方式 protected void LLRotation() { if( this.IsEmpty() ) throw new Exception("My:invalid operation!"); AVLTree avlB=new AVLTree(this.key); avlB.AttachSubtree(1,(AVLTree)this[0][1]); avlB.AttachSubtree(2,(AVLTree)this[1]); this.key=this[0].Key; this[0]=this[0][0]; this[1]=avlB; //调整两个节点的高度 ((AVLTree)this.Right).AdjustHeight(); this.AdjustHeight(); } protected void LRRotation() { if( this.IsEmpty() ) throw new Exception("My:invalid operation!"); ((AVLTree)this.Left).RRRotation(); this.LLRotation(); } protected void RRRotation() { if( this.IsEmpty() ) throw new Exception("My:invalid operation!"); AVLTree avlB=new AVLTree(this.key); avlB.AttachSubtree(1,(AVLTree)this[0]); avlB.AttachSubtree(2,(AVLTree)this[1][0]); this.key=this[1].Key; this[0]=avlB; this[1]=this[1][1]; //调整两个节点的高度 ((AVLTree)this.Left).AdjustHeight(); this.AdjustHeight(); } protected void RLRotation() { if( this.IsEmpty() ) throw new Exception("My:invalid operation!"); ((AVLTree)this.Right).LLRotation(); this.RRRotation(); } //---------------override-------------------- public override void AttachKey(object _obj) { if(!IsEmpty()) throw new Exception("My:this node must be a empty tree node!"); this.key=_obj; //产生一个degree长的数组,并将其初始化为空树 this.treeList=new ArrayList(); this.treeList.Capacity=(int)this.degree; for(int i=0;i<this.degree;i++) { treeList.Add(new AVLTree()); } // this.height=0; } //在改动树的结构后平衡树 public override void Balance() { this.AdjustHeight(); //大于1则说明不平衡 if( Math.Abs(this.BalanceFactor())>1) { if(this.BalanceFactor()>0) { if (((AVLTree)this.Left).BalanceFactor()>0) this.LLRotation(); else this.LRRotation(); } else { if (((AVLTree)this.Right).BalanceFactor()<0) this.RRRotation(); else this.RLRotation(); } } } public int Height{get{return this.height;}} }
}C#实现二叉树
using System;using System.Collections;namespace DataStructure{ /// <summary> /// BinaryTree 的摘要说明。 /// </summary> public class BinaryTree:NaryTree { //构造二叉空树 public BinaryTree():base(2) { // // TODO: 在此处添加构造函数逻辑 // } public BinaryTree(object _obj):base(2,_obj) { } //------------------------------------------------------------------ protected override object GetEmptyInstance(uint _degree) { return new BinaryTree(_degree); } //------------------------------------------------------------------ //重写深度遍历 public override void DepthFirstTraversal(IPrePostVisitor _vis) { if ( !IsEmpty() ) { _vis.PreVisit(this.Key); this[0].DepthFirstTraversal(_vis); _vis.Visit(this.Key); this[1].DepthFirstTraversal(_vis); _vis.PostVisit(this.Key); } } //二叉树大小的比较 //先比较关键字，如果相等，再比较左子树，如果再相等，则比较右子树----如此递归#region IComparable 成员
public override int CompareTo(object obj) { // TODO: 添加 BinaryTree.CompareTo 实现 //因为Comare()中已经进行了类型断定，故不会出现转型错误 BinaryTree tmpTree=(BinaryTree)obj; if( this.IsEmpty() ) return tmpTree.IsEmpty()?0:-1; if( tmpTree.IsEmpty() ) return 1; int result=Comparer.Default.Compare(this,tmpTree); if(result==0) result=this[0].CompareTo(tmpTree[0]); if(result==0) result=this[1].CompareTo(tmpTree[1]); return result; } #endregion }}C#希尔排序
using System; namespace ShellSorter { public class ShellSorter { public void Sort(int [] list) { int inc; for(inc=1;inc<=list.Length/9;inc=3*inc+1); for(;inc>0;inc/=3) { for(int i=inc+1;i<=list.Length;i+=inc) { int t=list[i-1]; int j=i; while((j>inc)&&(list[j-inc-1]>t)) { list[j-1]=list[j-inc-1]; j-=inc; } list[j-1]=t; } } } } public class MainClass { public static void Main() { int[] iArrary=new int[]{1,5,13,6,10,55,99,2,87,12,34,75,33,47}; ShellSorter sh=new ShellSorter(); sh.Sort(iArrary); for(int m=0;m<iArrary.Length;m++) Console.Write("{0} ",iArrary[m]); Console.WriteLine(); } } } C#实现插入排序
using System; namespace InsertionSorter { public class InsertionSorter { public void Sort(int [] list) { for(int i=1;i<list.Length;i++) { int t=list[i]; int j=i; while((j>0)&&(list[j-1]>t)) { list[j]=list[j-1]; --j; } list[j]=t; } } } public class MainClass { public static void Main() { int[] iArrary=new int[]{1,13,3,6,10,55,98,2,87,12,34,75,33,47}; InsertionSorter ii=new InsertionSorter(); ii.Sort(iArrary); for(int m=0;m<iArrary.Length;m++) Console.Write("{0}",iArrary[m]); Console.WriteLine(); } } } C#实现选择排序
using System; namespace SelectionSorter { public class SelectionSorter { private int min; public void Sort(int [] list) { for(int i=0;i<list.Length-1;i++) { min=i; for(int j=i+1;j<list.Length;j++) { if(list[j]<list[min]) min=j; } int t=list[min]; list[min]=list[i]; list[i]=t; } } } public class MainClass { public static void Main() { int[] iArrary=new int[]{1,5,3,6,10,55,9,2,87,12,34,75,33,47}; SelectionSorter ss=new SelectionSorter(); ss.Sort(iArrary); for(int m=0;m<iArrary.Length;m++) Console.Write("{0} ",iArrary[m]); Console.WriteLine(); } } } C#实现冒泡排序
using System; namespace BubbleSorter { public class BubbleSorter { public void Sort(int [] list) { int i,j,temp; bool done=false; j=1; while((j<list.Length)&&(!done)) { done=true; for(i=0;i<list.Length-j;i++) { if(list[i]>list[i+1]) { done=false; temp=list[i]; list[i]=list[i+1]; list[i+1]=temp; } } j++; } } } public class MainClass { public static void Main() { int[] iArrary=new int[ ]{1,5,13,6,10,55,99,2,87,12,34,75,33,47}; BubbleSorter sh=new BubbleSorter(); sh.Sort(iArrary); for(int m=0;m<iArrary.Length;m++) Console.Write("{0} ",iArrary[m]); Console.WriteLine(); } } } 