用c++实现两个文件打包和拆包，经测试对常用的格式txt，doc，mp3，jpg等均通过。-Using c++ to achieve the two documents packing and unpacking, the commonly used test format for the txt, doc, mp3, jpg, etc. through.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001286s ]
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:0.091463s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001257s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001960s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001301s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003724s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001287s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003266s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016051s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001449s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 60036 [ RunTime:0.001352s ]
