swap(&arr[i], &arr[j]);
A reference implementation for this alternative approach is available now and can be found at https://github.com/jasnell/new-streams.，更多细节参见服务器推荐
Discover all the plans currently available in your country。业内人士推荐旺商聊官方下载作为进阶阅读
void siftDown(int arr[], int n, int i) {