非常经典的数据结构课程中，以C++解决逆波兰表达式的问题。给出了详细的算法和输出结果-A very classic data structures course, in order to solve the C++ Reverse Polish Notation issues. Gives a detailed algorithm and output
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.012687s ]
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:0.134532s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001094s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001420s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001149s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003716s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001030s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004216s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015127s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001128s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 61697 [ RunTime:0.019264s ]
