set a=123456
if [%a:~3,3%] equ [] (echo %a:~0,3%) else if [%a:~6,3%] equ [] (echo %a:~0,3%,%a:~3,3%) else (echo %a:~0,3%,%a:~3,3%,%a:~6,3%)
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set "Num=1234567"
PowerShell -c "(%Num%).ToString('0,0')"
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@echo off
set a=-2000000
set /a b=a/1000
set /a c=a/1000000
if %b%==0 (echo %a%) else (
	if %c%==0 (echo %a:~0,-3%,%a:~-3%) else (echo %a:~0,-6%,%a:~-3,3%,%a:~-3%))
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@mshta http://bathome.net/s/hta/ "'%random%'.replace(/\d(?=(?:\d{3})+$)/g,'$&,')"|more
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[regex]::Replace('1234567','(?<=\d)\d{3}', ',$&','RightToLeft')
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@echo off
setlocal enabledelayedexpansion
set num=-14159265358979323846264338327950288314159265358979323846264338327950288
:cut
set p=!num:~-3!
if "!num!"=="" (echo !p1:~0,-1! & pause & exit)
set p1=!p!,!p1!
set num=!num:~0,-3!
goto cut
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"{:,}".format(33333)
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这个问题只要把判断并去掉正负号，然后把字符串翻转，这个问题就等于如何把一个字符串或者序列每3个切成一份。
>>> s="12345"
>>> ','.join([s[::-1][r:r+3] for r in range(0,len(s),3)])[::-1]
'12,345'
>>> 
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    @echo off
    set a=1000052
    set /a b=a/1000
    set /a c=a/1000000
    if %b%==0 (echo %a%) else (
            if %c%==0 (echo %a:~0,-3%,%a:~-3%) else (echo %a:~0,-6%,%a:~-6,3%,%a:~-3%))
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@echo off & setlocal enabledelayedexpansion
set "n=-1234567890"
for /l %%i in (-18 3 -3) do set "n=!n:~0,%%i!,!n:~%%i!"
for /f "tokens=*delims=," %%i in ("%n%") do set "n=%%i"
echo;%n:-,=-%
pause
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@echo off
setlocal enabledelayedexpansion
set /p num=输入数字:
:cut
if "!num!"=="" (
	set p1=!p1:-,^=-!
	echo !p1:~1! &pause>nul&exit
)
set p1=,!num:~-3!!p1!
set num=!num:~0,-3!
goto cut
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@echo off
setlocal enabledelayedexpansion
for /f %%i in ("123465") do (
echo %%i
set a=%%i
echo !a:~0,2!)
pause
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@echo off&setlocal enabledelayedexpansion
set /p num=输入数字:
for /l %%i in (1 1 1000) do (if !num! equ 0 (set p1=!p1:-,=-!&set /p =!p1:~1!) else (set p1=,!num:~-3!!p1!&set num=!num:~0,-3!))
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set /a t=(%t2:~0,2%-%t1:~0,2%)*60+(%t2:~3,2%-%t1:~3,2%)
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set /a t=(!t2:~0,2!-!t1:~0,2!)*60+(!t2:~3,2!-!t1:~3,2!)
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@echo off
setlocal enabledelayedexpansion
set t=100000000
set /a pi=t-t/2-t/5-t/6
for /l %%i in (1 1 4) do (set /a pi=((4*t/(8*%%i+1^)-2*t/(8*%%i+4^)-t/(8*%%i+5^)-t/(8*%%i+6^)^)^>^>4*%%i^)+pi)
echo 3.!pi!
pause
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echo echo ----^>第!i!行
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@echo off
set /p=<nul >url.txt
for /f %%i in (dnsserver.txt) do (
	echo %%i>>url.txt
	echo %%ipage/2/>>url.txt
	echo %%ipage/3/>>url.txt)
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@echo off
if %1=="" exit
set n=1
(for /f "delims=" %%i in ('type %1') do (
	call,echo @echo ---第%%n%%行---
	set /a n+=1
	set /p =%%i<nul
	echo,&echo pause^>nul&echo,
)
)>.\正在调试_%~nx1
start .\正在调试_%~nx1
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@echo off
set /p=<nul >url.txt
for /f %%i in (dnsserver.txt) do (
	echo %%i>>url.txt
	echo %%ipage/2/>>url.txt
	echo %%ipage/3/>>url.txt)
pause
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