简单整型表达式文法按递归下降方式设计其编译程序，生成PL/0栈式指令代码，然后解释执行-simple integer expression by recursive grammar dropped to design its compiler, generating PL/0 Stack-code instructions, and then the interpretation and implementation of
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001435s ]
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:0.074726s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000972s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001273s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000982s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003144s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000804s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003387s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023681s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001366s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 119311 [ RunTime:0.015857s ]
