(原标题为:求解:一个菜鸟编程中的问题!)
编写了一个shell命令cp
代码如下:
#include
by melonmelon - C/C++ - 2006-12-28 20:35:32 阅读(4251) 回复(10)
#include
我用 if [ $i -eq 100 ] 就出现了这个错误:integer expression expected 从字面上理解就是变量i应该是个integer类型的 但是如何把一个字符型数字转换成整形呢?
以下是port.sh的内容 #! /bin/bash # program: Using to study the [if... then ...fi] program # Written by :Beyond # date: 2007/06/15 # content: I will be using this program to show your services # 1. print the program's work in your screen echo "Now, the services of your Linux system will be detect!" echo "The www, ftp, ssh, and sendmail + pop3 will be detect!" echo " " # 2. www www='netstat ...
原代码如下: fsmax="85" maillist1="[email]cold@163.com[/email]" maillist2="[email]hot@163.com[/email]" df -k | grep '/dev/h' | awk '{print $1,$5,$6}'>mailfile mail -s "Filesystem Information" $maillist1 < mailfile mail -s "Filesystem Information" $maillist2 < mailfile df -k | grep '/dev/h' | awk '{print $5}'>outfile while [ read fsvalue ] do fsvalue=$(echo $fsvalue | sed 's/\%//') ...
环境: CentOS 5 + BASH 每次用export时总会看到后面一个提示: not a valid identifier ,但export后的PATH可以正常使用. 何故? 如下: [root@lovexia shell]# echo $PATH /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/ossec/bin [root@lovexia shell]# PATH=$PATH:/usr/local/mysql/bin [root@lovexia shell]# echo $PATH /usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bi...
我的数据库中, 有history_product, product, stateA_product, stateB_product等几个表, 存放的都是product这样的一个数据, 为了唯一标识product, 定义了 create table idtable( idtype varchar(32), id int unsigned) ENGINE=INNODB; 然后每次都用 begin; select id from idtable where idtype='xxx' for update; insert into product values(id_from_idtable, ...); update idtable set id=id+1 where idtype='xxx'; commit; 这...
typedef enum { false = 0, true = 1 } bool; 我运行完我的代码后,弹出问题:parse error before 'false' declaration does not declare anything 应该怎么进行修改呀~ 请高手指点一下。。谢谢哈~
我在头文件中定义 typedef struct { ...; }A; typedef struct { ...; }B; 在C文件中定义 int func() { A* pA = NULL; B* pB = NULL; ....; } 用gcc编译时报 parse error before `pA' parse error before `pB' 什么情况,真是郁闷