修改对链表分段的函数，使用链表的长度信息。其次要求把归并排序的每一步过程都打印出来。自己构造一个链表类并实现，用于排序。另外生成随机数的类-Modify the sub-list function, use the length of the message list. Second, requested that the process every step of mergesort are printed. Construct their own class and implement a list for sorting. Another class of random number generation
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001245s ]
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:0.086442s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001164s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001896s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001166s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003621s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000980s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003327s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014721s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001236s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 235636 [ RunTime:0.001260s ]
