快速排序两种代码

#include
#include
#include
#include
using namespace std;
void QuickSort(vector& arr, int start, int end)
{
	if (start >= end)return;
	int low = start;
	int high = end;
	int tmp = arr[low];

	while (low < high)
	{
		while (lowtmp)high--;
		if (low < high)arr[low++] = arr[high];
		while (low < high &&arr[low] < tmp)low++;
		if (low < high)arr[high--] = arr[low];
	}
	arr[low] = tmp;
	QuickSort(arr, start, low - 1);
	QuickSort(arr, low + 1, end);
	return;
}
int main()
{
	vectorarr{0, 8, 4, 6, 9, 2, 3, 1, 7, 5};
	int len = arr.size();
	QuickSort(arr, 0,len-1);
	return 0;
}

第二种：参考剑指offer；

#include
#include
#include
#include
using namespace std;
void Swap(int* a, int* b)
{
	int tmp = *a;
	*a = *b;
	*b = tmp;
	return;
}
void QuickSort(vector& arr, int start, int end)
{
	if (start >= end)return;
	int tmp = arr[start];
	int minIndex = start;
	for (int index = start + 1; index <= end; index++)
	{
		if (arr[index] < tmp)
		{
			minIndex++;
			if (minIndex != index)Swap(&arr[minIndex],&arr[index]);
		}
	}
	Swap(&arr[minIndex], &arr[start]);
	QuickSort(arr, start, minIndex - 1);
	QuickSort(arr, minIndex + 1, end);
	return;
}
int main()
{
	vectorarr{4,3,2,1,0};
	int len = arr.size();
	QuickSort(arr, 0,len-1);
	return 0;
}