常用经典算法

一、冒泡排序(Bubble)
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();
  }
}
}

二、选择排序(Selection)

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();
  }
}
}

三、插入排序(InsertionSorter)

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();
  }
}
}

四、希尔排序(ShellSorter)

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();
  }
}
}