实现凸多边形的三角剖分，c++源代码，拷到编译器下即可调试运行，没错误，不想下的很多程序代码调试有错误。-Achieve convex polygon triangulation, c++ source code, copying it to debug the compiler can be run under, no errors, do not want to debug code under a lot of mistakes.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000948s ]
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:0.062470s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000993s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001124s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000913s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003124s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000843s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003633s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023154s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001638s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 66734 [ RunTime:0.018643s ]
