说明： 本示例演示如何创建一个弹跳球在窗体上，也 let 你操纵动力学损失和重力设置。我找到的这个在线创建在 Java 中，它看起来有趣，于是转换了它不断改进的简化版本。这方程式仍然有几个缺陷在它，你可以读到在项目文件中，很好的来源，学会如何物理和 c + + 可以进行交互，如果你使用这实现更大改进请递给别人沿。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001398s ]
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:0.093048s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001259s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001971s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001287s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003629s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001080s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003306s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016229s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001522s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 98844 [ RunTime:0.001605s ]
