针对matlab中快速傅立叶变换，我们用C++语言来实现同样的功能。排序的方法用的蝶形算法，也是快速算法。FFT的c++代码实现，效率比MATLAB的要高一点，并且已经调试通过。-FFT of c++ code to achieve efficiency is higher than that of MATLAB, and has passed testing.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001296s ]
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:0.059974s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001137s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001297s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001001s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003005s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000899s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003398s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015896s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001336s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 63809 [ RunTime:0.016748s ]
