C#实现所有经典排序算法(选择排序 冒泡排序 快速排序)

 

1、选择排序

class SelectionSorter   
{   
    private int min;   
    public void Sort(int[] arr)   
    {   
        for (int i = 0; i < arr.Length - 1; ++i)   
        {   
            min = i;   
            for (int j = i + 1; j < arr.Length; ++j)   
            {   
                if (arr[j] < arr[min])   
                    min = j;   
            }   
            int t = arr[min];   
            arr[min] = arr[i];   
            arr[i] = t;   
        }   
    }   
    static void Main(string[] args)   
    {   
        int[] array = new int[] { 1, 5, 3, 6, 10, 55, 9, 2, 87, 12, 34, 75, 33, 47 };   
        SelectionSorter s = new SelectionSorter();   
        s.Sort(array);   
        foreach (int m in array)   
            Console.WriteLine("{0}", m);   
    }   
}

2、冒泡排序
class EbullitionSorter   
{   
    public void Sort(int[] arr)   
    {   
        int i, j, temp;   
        bool done = false;   
        j = 1;   
        while ((j < arr.Length) && (!done))//判断长度   
        {   
            done = true;   
            for (i = 0; i < arr.Length - j; i++)   
            {   
                if (arr[i] > arr[i + 1])   
                {   
                    done = false;   
                    temp = arr[i];   
                    arr[i] = arr[i + 1];//交换数据   
                    arr[i + 1] = temp;   
                }   
            }   
            j++;   
        }   
    }   
  
    static void Main(string[] args)   
    {   
        int[] array = new int[] { 1, 5, 3, 6, 10, 55, 9, 2, 87, 12, 34, 75, 33, 47 };   
        EbullitionSorter e = new EbullitionSorter ();   
        e.Sort(array);   
        foreach (int m in array)   
            Console.WriteLine("{0}", m);   
  
    }   
}

3、快速排序

class QuickSorter   
{   
    private void swap(ref int l, ref int r)   
    {   
        int temp;   
        temp = l;   
        l = r;   
        r = temp;   
    }   
    public void Sort(int[] list, int low, int high)   
    {   
        int pivot;//存储分支点   
        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);   
    }   
  
    static void Main(string[] args)   
    {   
        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]);   
    }   
}   

4、插入排序

public class InsertionSorter   
{   
    public void Sort(int[] arr)   
    {   
        for (int i = 1; i < arr.Length; i++)   
        {   
            int t = arr[i];   
            int j = i;   
            while ((j > 0) && (arr[j - 1] > t))   
            {   
                arr[j] = arr[j - 1];//交换顺序   
                --j;   
            }   
            arr[j] = t;   
        }   
    }   
    static void Main(string[] args)   
    {   
        int[] array = new int[] { 1, 5, 3, 6, 10, 55, 9, 2, 87, 12, 34, 75, 33, 47 };   
        InsertionSorter i = new InsertionSorter();   
        i.Sort(array);   
        foreach (int m in array)   
            Console.WriteLine("{0}", m);    
    }   
}   

5、希尔排序

public class ShellSorter   
{   
    public void Sort(int[] arr)   
    {   
        int inc;   
        for (inc = 1; inc <= arr.Length / 9; inc = 3 * inc + 1) ;   
        for (; inc > 0; inc /= 3)   
        {   
            for (int i = inc + 1; i <= arr.Length; i += inc)   
            {   
                int t = arr[i - 1];   
                int j = i;   
                while ((j > inc) && (arr[j - inc - 1] > t))   
                {   
                    arr[j - 1] = arr[j - inc - 1];//交换数据   
                    j -= inc;   
                }   
                arr[j - 1] = t;   
            }   
        }   
    }   
  
    static void Main(string[] args)   
    {   
        int[] array = new int[] { 1, 5, 3, 6, 10, 55, 9, 2, 87, 12, 34, 75, 33, 47 };   
        ShellSorter s = new ShellSorter();   
        s.Sort(array);   
        foreach (int m in array)   
            Console.WriteLine("{0}", m);    
    }   
}