set a=192.168.1.2
set b=%a:~0,7%
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@echo off
set a=10.112.1.1
for /f "delims=. tokens=1,2" %%i in ("%a%") do (set b=%%i.%%j)
echo %b%
pause
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@echo off & setlocal enabledelayedexpansion
set "a=192.168.1.2"
set b=%a:*.=%
set b=!a:.%b%=!.!b:.%b:*.=%=!
echo %b%
pause
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@echo off
for /f "delims=: tokens=2" %%i in ('ipconfig ^| find /i "IPv4"') do echo %%i
pause>nul
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@echo off
for /f "delims=: tokens=2" %%i in ('ipconfig ^| find /i "IP Address"') do echo %%i
pause>nul
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@echo off
set ip=192.168.1.1
call :next %ip:.= %
pause
exit

:next
    echo %1.%2
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@echo off
set ip=192.168.1.1
(set b=)&(set a=%ip:.=)&(if not defined b set b=%)
echo %a%.%b%
pause
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@echo off
%1 set ip=192.168.1.1
%1 %0 : %ip:.= %&eixt/b
echo %2.%3
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(set b=)&(set a=%ip:.=)&(if not defined b set b=%)
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set b=&(set a=192)&(if not defined b set b=168)&(if not defined b set b=1)&(if not defined b set b=2)
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(set b=)&(set a=%ip:.=)&(if not defined b set b=%)
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)&(if not defined b set b=168)&(if not defined b set b=1)&(if not defined b set b=1
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(set a=192)&(if not defined b set b=168)&(if not defined b set b=1)&(if not defined b set b=1)
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set b=
set a=192
if not defined b set b=168
if not defined b set b=1
if not defined b set b=1
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@echo off
set ip=192.168.1.1
(set a=%ip:.=)&&set 2>nul /a 1/!-~(b=%)
echo %a%.%b%
pause
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@echo off
set str=192.168.10.255
set b=%str:*.=%
call echo %%str:.%b:*.=%=%%
pause
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@echo off
set ip=192.168.1.1
for %%a in (%ip%) do for %%b in (%%~na) do echo %%~na
pause
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set a=192.168.1.2
set /a "x=(((%a:.=)<<8|%,p=x>>24&255,q=x>>16&255"
echo %p%.%q%
pause
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set a=192.168.1.1
set /a "a=%ip:.=,b=c,c=d,d=%"
echo %a%.%b%
pause
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set a=192.168.1.2
set /a "p=%a:.=,q=q<<8|%,q>>=16"
echo %p%.%q%
rem 等效的四则运算
set /a "p=%a:.=,q=q*256+%,q/=65536"
echo %p%.%q%
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set "a=192.168.1.2"
set /ab=a,p=%a:*.=%
echo %b% %p%
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