六种内排序比较次数、交换次数比较

• 内容：随机生成1万个数据保存在文件中，使用六个内排序算法，分别对这个文件进行排序，统计排序过程中各算法的比较次数及数据交换次序。列表输出。
• 代码：

• /*测试环境：VS2017*/
  
  #include<iostream>
  #include<fstream>
  #include<stdlib.h>
  #include<iomanip>
  using namespace std;
  
  const int N = 10000;
  int a[N], temp[N];
  unsigned int count_Exc, count_Com;
  
  inline void Swap(int&a, int&b)
  {
  	int temp = a;
  	a = b;
  	b = temp;
  	count_Exc++;
  }
  
  inline void CopyData()
  {
  	for (int i = 0; i < N;i++)
  		temp[N] = a[N];
  }
  
  inline int Compare(int a,int b)
  {
  	count_Com++;
  	return a - b;
  }
  
  inline void ReadDate()
  {
  	count_Exc = 0;
  	count_Com = 0;
  	ifstream datafile("data.txt");
  	int i=0;
  	if (!datafile.is_open())
  		cout << "无法打开文件data.txt!" << endl;
  	else
  		while (!datafile.eof()&&i<N)
  			datafile >> a[i++];
  	datafile.close();
  }
  
  void CreatData()
  {
  	ofstream datafile("data.txt");
  	for (int i = 0; i < N; i++)
  	{
  		datafile << rand() << "	";
  		if ((i + 1) % 10 == 0)
  			datafile << endl;
  	}
  	datafile.close();
  }
  
  void Print()
  {
  	for (int i = 0; i < N; i++)
  	{
  		cout << a[i] << "	";
  		if ((i + 1) % 10 == 0)
  			cout << endl;
  	}
  	cout << "******************************************************************************" << endl;
  }
  
  
  void bubbleSort()
  {
  	for (int i = 0; i<N - 1; i++)
  		for (int j = 0; j < N - 1 - i; j++)
  		{
  			if (Compare(a[j],a[j+1])>0)
  				Swap(a[j], a[j + 1]);
  		}
  }
  
  void selectSort()
  {
  	int index;
  	for (int i = 0; i < N - 1; i++)
  	{
  		index = i;
  		for (int j = i + 1; j < N; j++)
  		{
  			if (Compare(a[j],a[index])<0)
  				index = j;
  		}
  		Swap(a[i], a[index]);
  	}
  }
  
  void insertSort()
  {
  	int preindex, current;
  	for (int i = 1; i < N; i++)
  	{
  		preindex = i - 1;
  		current = a[i];
  		while (preindex > -1 && Compare(a[preindex] , current)>0)
  		{
  			a[preindex + 1] = a[preindex];
  			count_Exc++;//
  			preindex--;
  		}
  		a[preindex + 1] = current;
  		count_Exc++;//
  	}
  }
  
  void shellSort()
  {
  	int	temp, gap = 1;
  	while (gap < N / 3)     
  		gap = gap * 3 + 1;
  	for (gap; gap > 0; gap = floor(gap / 3))
  		for (int i = gap, j; i < N; i++)
  		{
  			temp = a[i];
  			for (j = i - gap; j >= 0 && Compare(a[j], temp) > 0; j -= gap)
  			{
  				a[j + gap] = a[j];
  				count_Exc++;
  			}
  			a[j + gap] = temp;
  			//count_Exc++;
  		}
  }
  
  void mergeSort(int arry[] = a, int b[] = temp, int left = 0, int right = N - 1)
  {
  	if (left == right)
  		return;
  	int mid = (left + right) / 2;
  	mergeSort(arry, temp, left, mid);
  	mergeSort(arry, temp, mid + 1, right);
  
  	for (int i = left; i <= right; i++)
  		temp[i] = arry[i];
  
  	int i1 = left;
  	int i2 = mid + 1;
  	for (int curr = left; curr <= right; curr++)
  	{
  		if (Compare(i1 , mid + 1)==0)
  		{
  			arry[curr] = temp[i2++];
  			count_Exc++;
  		}
  		else if (Compare(i2 , right)>0)
  		{
  			arry[curr] = temp[i1++];
  			count_Exc++;
  		}
  		else if (Compare(temp[i1] , temp[i2])<0)
  		{
  			arry[curr] = temp[i1++];
  			count_Exc++;
  		}
  		else
  		{
  			arry[curr] = temp[i2++];
  			count_Exc++;
  		}
  	}
  }
  
  void quickSort(int arry[] = a, int left = 0, int right = N - 1)
  {
  	if (right <= left)
  		return;
  	int pivotindex = (left + right) / 2;
  	Swap(arry[pivotindex], arry[right]);
  	//划分
  	int L = left - 1, R = right;
  	do
  	{
  		while (Compare(arry[++L] , arry[right])<0);
  		while (L < R &&Compare(arry[right] , arry[--R])<0);
  		Swap(arry[L], arry[R]);
  	} while (L < R);
  
  	Swap(arry[L], arry[right]);
  	quickSort(arry, left, L - 1);
  	quickSort(arry, L + 1, right);
  }
  
  
  int main()
  {
  	CreatData();
  	cout << "排序算法		" << "比较次数		" << "交换次数" << endl;
  	
  	ReadDate();
  	bubbleSort();
  	cout << "冒泡排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  	
  	ReadDate();
  	selectSort();
  	cout << "选择排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  	
  	ReadDate();
  	insertSort();
  	cout << "插入排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  	
  	ReadDate();
  	shellSort();
  	cout << "希尔排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  
  	ReadDate();
  	mergeSort();
  	cout << "归并排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  
  	ReadDate();
  	quickSort();
  	cout << "快速排序		" << setw(8) << count_Com << setw(24) << count_Exc << endl;
  	
  
  
  	system("pause");
  }