用C++写的寻找公共祖先，实现树的先序后序中序层次遍历，内有实验报告可以参阅。-C wrote for the public ancestors, the first realization of the tree sequence after sequence traversal sequence level, there are experimental report can be found.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001381s ]
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:0.090953s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001221s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001946s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001225s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003529s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001035s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003152s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016140s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001371s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 62663 [ RunTime:0.001171s ]
