@echo off
echo Cleaning contents of all obj folders (keeping the obj folder itself)...

for /d /r . %%d in (obj) do @if exist "%%d" (
    echo Cleaning contents of: "%%d"
    
    REM 删除 "%%d" 目录下的所有文件（包括子文件夹里的文件）
    del /f /s /q "%%d\*" > nul 2>&1

    REM 删除 "%%d" 目录下的所有子文件夹
    for /d %%i in ("%%d\*") do rd /s /q "%%i"
)

echo.
echo Done.
pause