C#实现所有经典排序算法

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本文详细介绍C#实现所有经典排序算法

//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); 
  } 
} 
//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); 
 
  } 
} 
//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]); 
  } 
} 
//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);  
  } 
} 
//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);  
 
  } 
} 

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