单纯形法c++编程，以解决运筹学中线性规划问题，程序简单明了，对于初学者来说是一个很不错的选择-Simplex Method c programming, operations research to solve linear programming problems, procedures simple and clear, for a newcomer is a very bad choice
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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:0.382404s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.017453s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.004428s ]
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