WHY

set "Num=1234567"
PowerShell -c "(%Num%).ToString('0,0')"
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WHY

.net 正则中有一个从右向左搜索的选项：

[regex]::Replace('1234567','(?<=\d)\d{3}', ',$&','RightToLeft')
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WHY

@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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WHY

回复 48# happy886rr


    我不想打击你，用批处理拖拽，它这么弄都不能够算完美