使用C++开发过程中，经常要查找一些类，该文档提供C++的标准类的参考。-use C development process, often to find some categories, the document provides the standard C category reference.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001991s ]
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:0.085453s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002531s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001921s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002227s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003605s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002011s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003181s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014832s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002592s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 66118 [ RunTime:0.001185s ]
