C语言实现的矩阵的常用计算！包括：矩阵乘法，加法，求逆，转置，开方等等！-C language used in the calculation of matrix! Including : matrix multiplication, addition, the inverse transfer home, prescribing, etc.!
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001381s ]
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:0.072952s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001123s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001106s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001134s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003284s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000806s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003699s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015102s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001224s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 123969 [ RunTime:0.015135s ]
