堆排序

堆排序

感觉。。不如快排

#include<stdio.h>


void adjust_max_heap(int* arr, int adjust_pos, int len)
{
	int dad = adjust_pos;
	int son = 2 * dad + 1;

	while (son < len)
	{
		if (son + 1 < len && arr[son] < arr[son + 1])
		{
			son++;
		}
		if (arr[son] > arr[dad])
		{
			int temp;//若孩子大于父亲，则交换
			temp = arr[son];
			arr[son] = arr[dad];
			arr[dad] = temp;

			dad = son;//验证新的孩子节点是否满足
			son = dad * 2 + 1;
		}
		else
		{
			break;
		}
	}
}

void heap_sort(int* arr)
{
	for (int i = 10 / 2 - 1; i >= 0; i--)//初始化大根堆
	{
		adjust_max_heap(arr, i, 10);
	}

	int temp;//将最大元素转移至末尾
	temp = arr[0];
	arr[0] = arr[10 - 1];
	arr[10 - 1] = temp;

	for (int i = 10 - 1; i > 1; i--)
	{
		adjust_max_heap(arr, 0, i);
		temp = arr[0];
		arr[0] = arr[i - 1];
		arr[i - 1] = temp;
	}
}



int main()
{
	int arr[10] = { 9,3,5,7,1,2,4,6,8,0 };
	heap_sort(&arr);

}