C#算法-------(四)快速排序

C#算法-------(四)快速排序

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--- C#算法-------(四)快速排序 (http://www.webasp.net/article/5/4197.htm)

-- 作者：未知
-- 发布日期： 2003-07-12

using System;

namespace QuickSorter
{
public class QuickSorter
{
  private void Swap(ref int l,ref int r)
  {
   int s;
   s=l;
   l=r;
   r=s;
  }
  public void Sort(int [] list,int low,int high)
  {
   int pivot;
   int l,r;
   int mid;
   if(high<=low)
    return;
   else if(high==low+1)
   {
    if(list[low]>list[high])
     Swap(ref list[low],ref list[high]);
    return;
   }
   mid=(low+high)>>1;
   pivot=list[mid];
   Swap(ref list[low],ref list[mid]);
   l=low+1;
   r=high;
   do
   {
   while(l<=r&&list[l]<pivot)
    l++;
   while(list[r]>=pivot)
    r--;
    if(l<r)
     Swap(ref list[l],ref list[r]);
   }while(l<r);
   list[low]=list[r];
   list[r]=pivot;
   if(low+1<r)
    Sort(list,low,r-1);
   if(r+1<high)
    Sort(list,r+1,high);
  }
}
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};
   QuickSorter q=new QuickSorter();
   q.Sort(iArrary,0,13);
   for(int m=0;m<=13;m++)
    Console.WriteLine("{0}",iArrary[m]);
  }
}

}

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