输入数组，最大的与第一个元素交换，最小的与最后一个元素交换，输出数组。 程序分析：谭浩强的书中答案有问题。-input array, the largest and one of the elements in the first exchange, and the smallest elements of a final exchange, the output array. Program Analysis : Tan-book answer to a problem.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001694s ]
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:0.081155s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001256s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001139s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000984s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003129s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000836s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003691s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018514s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001149s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 67816 [ RunTime:0.015786s ]
