刚完成不久的作业，请大家帮忙看一下那里有错，是一个数据结构的二叉树排序的实现-Operation just completed, please help everyone to look at where there is a mistake, is a binary tree data structure to sort of realize
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.003056s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.095393s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000994s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001091s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001051s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003017s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000830s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003805s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.013995s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001013s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 237106 [ RunTime:0.028733s ]
