堆的基本操作，插入删除，把数组变为小根堆，并检查是否为小根堆，用小根堆排序的方法按降序对大小为n的数组进行排序。-The basic operation of the heap, insert delete the array into a heap of small roots, and check the heap for small roots, roots with a small heap sort in descending order by means of an array of size n sort.