设置环境变量时的搜索和替换:

> @set fname=%date:/=%

.．.从日期中删除“/”以用于带时间戳的文件名。

还有子字符串……

> @set dayofweek=%fname:~0,3%

脚本所在的路径(带驱动器):~dp0

set BAT_HOME=%~dp0
echo %BAT_HOME%
cd %BAT_HOME%

抽取随机的文本行

@echo off

:: Get time (alas, it's only HH:MM xM

for /f %%a in ('time /t') do set zD1=%%a



:: Get last digit of MM

set zD2=%zD1:~4,1%



:: Seed the randomizer, if needed

if not defined zNUM1 set /a zNUM1=%zD2%


:: Get a kinda random number

set /a zNUM1=zNUM1 * 214013 + 2531011

set /a zNUM2=zNUM1 ^>^> 16 ^& 0x7fff


:: Pull off the first digit

:: (Last digit would be better, but it's late, and I'm tired)

set zIDX=%zNUM2:~0,1%


:: Map it down to 0-3

set /a zIDX=zIDX/3


:: Finally, we can set do some proper initialization

set /a zIIDX=0

set zLO=

set zLL=""


:: Step through each line in the file, looking for line zIDX

for /f "delims=@" %%a in (c:\lines.txt) do call :zoo  %zIDX%  %%a


:: If line zIDX wasn't found, we'll settle for zee LastLine

if "%zLO%"=="" set zLO=%zLL%

goto awdun


:: See if the current line is line zIDX

:zoo


:: Save string of all parms

set zALL=%*


:: Strip off the first parm (sure hope lines aren't longer than 254 chars)

set zWORDS=%zALL:~2,255%


:: Make this line zee LastLine

set zLL=%zWORDS%


:: If this is the line we're looking for, make it zee LineOut

if {%1}=={%zIIDX%} set zLO=%zWORDS%


:: Keep track of line numbers

set /a zIIDX=%zIIDX% + 1

goto :eof




:awdun

echo ==%zLO%==


:: Be socially responsible

set zALL=

set zD1=

set zD2=

set zIDX=

set zIIDX=

set zLL=

set zLO=

:: But don't mess with seed

::set zNUM1=

set zNUM2=

set zWORDS=

命令分隔符:

cls & dir
copy a b && echo Success
copy a b || echo Failure

在第二行，&&之后的命令仅在第一个命令成功时运行。

在第3行，||之后的命令仅在第一个命令失败时运行。

我想说DEBUG.EXE是批处理文件中一个非常有用但却未被充分利用的特性。

DEBUG命令允许你…

汇编和反汇编16位代码 读/写内存(现代受保护的内存使这个功能变得不那么有用。) 从硬盘读取数据扇区，原始 十六进制编辑

简而言之，这个工具非常强大。现在可能已经不怎么使用了，但是从批处理脚本调用和控制这个功能的能力为批处理脚本增加了惊人的能力。

注意:据我所知，微软已经从64位版本的Windows Xp和Vista中删除了这个命令，并打算从Windows 7中完全删除它。

创建一个空文件:

> copy nul filename.ext