矩阵常见算法，C++实现的类，这是个下载的公用类如果侵犯了您的权利，请告诉我。-This class implements some usual operation about matrix.If this pragram being put on the internet
infringe upon your right,please tell me.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001119s ]
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:0.096464s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001070s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001863s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001176s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003546s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001000s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003202s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014786s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001339s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 66603 [ RunTime:0.001396s ]
