C/C++：堆排序

/**
*
* Althor: Hacker Hao
* Create: 2023.12.10
*
*/
#include 
using namespace std;
#define MAXSIZE 200
const int N = 1e5 + 10;
int a[N];
void HeapAdjust(int* arr, int start, int end)
{
	int tmp = arr[start];
	for (int i = 2 * start + 1; i <= end; i = i * 2 + 1)
	{
		if (i < end && arr[i] < arr[i + 1])//有右子树 且 左子树小于右子树
		{
			i++;
		}								//i一定为是左右子树最大值
		if (arr[i] > tmp)
		{
			arr[start] = arr[i];
			start = i;
		}
		else
			break;
	}
	arr[start] = tmp;
}
void HeapSort(int* arr, int n)
{
	//第一次建立大根堆，从后往前依次调整
	for (int i = (n - 1 - 1) / 2; i >= 0; i--)
	{
		HeapAdjust(arr, i, n - 1);
	}

	//每次将根和待排序的最后一次交换，然后在调整
	int tmp;
	for (int i = 0; i < n - 1; i++)
	{
		tmp = arr[0];
		arr[0] = arr[n - 1 - i];
		arr[n - 1 - i] = tmp;
		HeapAdjust(arr, 0, n - 1 - i - 1);
	}
}
int main()
{
	int n;
	cin >> n;
	for (int i = 0; i < n; i++)
		cin >> a[i];

	HeapSort(a, n);
	
	for (int i = 0; i < n; i++)
		cout << a[i] << " ";
	return 0;
}