一个由VC实现科学计算器程序，功能简单，程序也很浅显易懂，是VC初学者的好实例！-by a VC scientific calculator program, a simple function, the program is very simple words, VC is a good example of beginners!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001938s ]
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:0.113140s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002253s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001940s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002088s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003619s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002178s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003490s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015453s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002201s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 119722 [ RunTime:0.001180s ]
