本程序在turboc 2.0中运行 输入表达式，并计算出表达式的值 采用二叉树存储方法，计算速度比较快- This procedure in 2.0 moves the input expression in turboc, and
calculates the expression the value to use two forks the tree memory
method, the computation speed quite is quick
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001024s ]
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:0.062604s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001040s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001079s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001080s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003485s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000953s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003529s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015178s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001333s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 112797 [ RunTime:0.015844s ]
