《科学工程计算C语言算法》一书代码。C语言编写。均写成函数形式，可以直接调用。包括数值微分、数值积分、插值、方程求解等数值算法。-"scientific engineering calculation algorithm C language," a code book. C language. Functions were written form can be called directly. Including numerical differentiation, numerical integration, interpolation, equation solving numerical algorithms.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001204s ]
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:0.104481s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001023s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001088s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001059s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003137s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000878s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003805s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014587s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001029s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 219353 [ RunTime:0.029420s ]
