这是一个小程序，用VC++6.0来实现循环冗余码校验CRC算法。 标准为CRC-4，生成多项式为C（X）=X4+X+1，
应用举例为ITU G704
-This is a small program used to achieve VC 6.0 cyclical redundancy check CRC algorithm. Standards for the CRC-4, generating polynomial C (X) = X-1 X4, applications for the ITU G704
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000988s ]
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:0.063862s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000998s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001245s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001121s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003162s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000810s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003668s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015993s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001358s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 66718 [ RunTime:0.020032s ]
