三次样条插值程序。编译运行本程序后，程序会弹出窗口及问句：“input the number of intervals:”，输入插值的次数即可，程序将得到的次数保存在变量int n中。如果输入的插值次数正确（n>=2），程序会显示下一语句："input the value of the variable:"，此时输入插值点即可，程序将得到的插值点保存在变量double v中。若插值点正确（v>=0&&v<=6）,则程序将输出插值结果。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001190s ]
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:0.090338s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001187s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001419s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000968s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003096s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000862s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004096s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015792s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001233s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 442671 [ RunTime:0.015227s ]
