用C语言来实现的，雅可法可用于法实对称矩阵的全部特征值与对应的特征值向量。-Realizes with the language C, the way of Jacobi may be serviceable to the solid symmetrical matrix for complete characteristic value and the corresponding characteristic value vector.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001982s ]
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:0.098438s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002262s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003925s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002286s ]
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SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002432s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 302293 [ RunTime:0.001150s ]
