该文描述了C语言表达式的文法，并由该文法生成算符优先矩阵和算符优先函数，讨论了C语言表达式的特点和文法分析过程。-The paper describes the expression of the C language grammar, grammar generated by the operator priority matrix and operator priority function to discuss the C language features of the expression and grammar analysis.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.007959s ]
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:0.086947s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.000931s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001416s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001046s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003349s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000790s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003875s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.017114s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001067s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 288806 [ RunTime:0.043637s ]
