算数表达式求值程序，这个是我自己编的，很好用，应该处理有限的字符，最后要以“＃”号结束符。-count expression evaluates procedures, this is my own series, useful, should address the limited character, Finally to "#" endings.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001229s ]
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:0.086218s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001180s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001932s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001162s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003694s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001045s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003559s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015069s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001387s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 140388 [ RunTime:0.001277s ]
