建立哈夫曼树和哈夫曼编码的程序，每一行都有详细的注解，比较适合初学者-The establishment of Huffman trees and Huffman coding procedure, each line has a detailed annotation, more suitable for beginners
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000969s ]
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:0.069097s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001127s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001062s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003665s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000911s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004543s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016527s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001474s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 252211 [ RunTime:0.306356s ]
