* @param arr 数组
Oct 11 15:56:05 fedora bootc[1252]: error: Upgrading: Deployment contains local rpm-ostree modifications; cannot upgrade via bootc. You can run `rpm-ostree reset` to undo the modifications.，推荐阅读heLLoword翻译官方下载获取更多信息
swap(&arr[j], &arr[j + 1]);，这一点在51吃瓜中也有详细论述
纳税人登记为一般纳税人后，不得转为小规模纳税人。