@echo off & setlocal enabledelayedexpansion
set /p A=输入第一个文件夹:
set /p B=输入第二个文件夹:
FOR /F "delims==" %%i IN ('dir /b/s !A!\') DO set /a size1+=%%~zi
set /a a=!size1!/1024
FOR /F "delims==" %%i IN ('dir /b/s !B!\') DO set /a size2+=%%~zi
set /a b=a-!size2!/1024
echo !b:-=!KB
pause
Function ShowFolderSize(filespec)
Dim fso, f, s
Set fso = CreateObject("Scripting.FileSystemObject")
Set f = fso.GetFolder(filespec)
s = UCase(f.Name) & " uses " & f.size & " bytes."
ShowFolderSize = s
End Function