在可执行文件中输入二次方程的a b c值，即可判断是否存在可行解-In the executable file, enter values abc the quadratic equation, you can determine whether the existence of feasible solution
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001099s ]
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:0.063035s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001023s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001176s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000976s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003163s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000829s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003824s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015014s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001225s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 107016 [ RunTime:0.014438s ]
