软件设计核心----算法

如今的网站规划中算法不算多,但是想过面试这关,必须要掌握一些主流的算法,朋友上次面试就遇到了冒泡问题,在此顺带一提:

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);

forint m=0;m<iArrary.Length;m++

Console.Write(
"{0} ",iArrary[m]);

Console.WriteLine();

} }

}

选择排序 :

 

using System;


namespace SelectionSorter

{
public class SelectionSorter

{
private int min;

public void Sort(int [] list)

{
forint i=0;i<list.Length-1;i++

{ min
=i;

forint 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);

forint m=0;m<iArrary.Length;m++

Console.Write(
"{0} ",iArrary[m]);

Console.WriteLine();

} }

}

插入排序:

using System;

namespace InsertionSorter

{
public class InsertionSorter

{
public void Sort(int [] list)

{
forint 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);

forint m=0;m<iArrary.Length;m++

Console.Write(
"{0}",iArrary[m]);

Console.WriteLine();

} }

}
希尔排序 :希尔排序是将组分段,进行插入排序
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
{
forint 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);

forint m=0;m<iArrary.Length;m++
Console.Write(
"{0} ",iArrary[m]);
Console.WriteLine();
} }
}
posted @ 2011-05-10 09:44  brainmao  阅读(533)  评论(0编辑  收藏  举报