用于运算加减乘除的四则运算代码. 用一个复数结构ComplexNumber来存放一个复数；-arithmetic operations for the four Operational code. Using a complex structure ComplexNumber to store a plural;
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001045s ]
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:0.075548s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000991s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001193s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001045s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003315s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000988s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003921s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016221s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001186s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 297864 [ RunTime:0.016177s ]
