用批处理文件中的数组替换字符串变量进行循环

Question

I am trying to create a batch file to copy the file over network.

first i am mapping the drive using NET command and than copy file using xcopy .

follwing batch file works without any problem

    net use T: \\192.168.170.239\D /user:User1 PASSWROD
    set source=T:\backup
    set destination=D:\backup\
    xcopy %source% %destination% /y
    net use T: /delete 
    TIMEOUT 5

I would like to replace the static IP '192.168.170.239' and make any array of ip as below and replace the netuse command in a loop.

@echo off 
set obj[0]=192.168.170.239
set obj[1]=192.168.170.240
set obj[2]=192.168.170.241
set obj[3]=192.168.170.242

I have treid the following but didn't work

 @echo off
set len=2
set obj[0]=192.168.170.239
set obj[1]=192.168.170.240


set i=0
:loop
if %i% equ %len% goto :eof
for /f "usebackq delims== tokens=2" %%j in (`set obj[%i%]`) do (

net use T: \\%%j\D /user:User1 Password
TIMEOUT 10
set source=T:\Autobackup
set destination=D:\Autobackup\
xcopy %source% %destination% /y
net use T: /delete 
TIMEOUT 10

)
set /a i=%i%+1
goto loop

It works for the second ip but not for the first ip.

Answer 1

You should really be looking at a structure more like this:

@Echo Off

Rem Undefine any existing variables beginning with obj[
For /F "Delims==" %%A In ('Set obj[ 2^>Nul') Do Set "%%A=" 

Rem Define your IP list
Set "obj[0]=192.168.170.239"
Set "obj[1]=192.168.170.240"
Set "obj[2]=192.168.170.241"
Set "obj[3]=192.168.170.242"

Rem Define your Map Source and Destination
Set "map=T:"
Set "source=%map%\Autobackup"
Set "destination=D:\Autobackup\"

Rem Loop through the IP list
For /F "Tokens=1* Delims==" %%A In ('Set obj[ 2^>Nul') Do (

    Rem Make sure that %map% is not currently mapped
    Net Use %map% /Delete 2>Nul

    Rem Map the share
    Net Use %map% \\%%B\D /User:User1 Password

    Rem Perform the required operation
    XCopy "%source%" "%destination%" /Y

    Rem Delete the mapped share
    Net Use %map% /Delete 
)

Answer 2

Compo's answer is good. Another way to construct the loop follows. It does not use an "array" of variables. I find this easier to edit and understand.

SET IPLIST=^
192.168.170.239 ^
192.168.170.240 ^
192.168.170.241 ^
192.168.170.242

FOR %%a IN (%IPLIST%) DO (
    ECHO %%a
)