实现移位密码（扩展凯撒密码），用键盘接收明文和密钥，屏幕打印密文。
-Achieve translocation password (Extension Caesar password), use the keyboard to receive explicit and key, screen printing ciphertext.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001129s ]
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:0.110538s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.009147s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.005726s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.009496s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.008040s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.009798s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006040s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016737s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001422s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 193022 [ RunTime:0.018767s ]
