解N元一次方程，从文件读入整数 N, 然后读入N*（ N+1）矩阵，得到解并输出到文件中。-Solution of N-linear equation, reading from a file into an integer N, and then read into the N* (N+1) matrix obtained solution and the output to a file.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001135s ]
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:0.098002s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001398s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002978s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001799s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.006079s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001570s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.005697s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016089s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001367s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 311545 [ RunTime:0.001233s ]
