这是我们实习时编的，实现了基本的功能，如插入，删除，查找等。初学
C++的同志们可以参考：）-This is our attachments series to achieve the basic functions, such as inserting, deleting, and searching. Novice C comrades can reference :)
文 件 列 表
double list node.cpp node.h dlist.h manager.cpp manager.h main.cpp dlist.cpp
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001237s ]
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:0.104597s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000908s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001138s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001011s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003194s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000973s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003725s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015015s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001101s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 60640 [ RunTime:0.020015s ]
