CrLf

start /b经典方案，不是我写的：

@echo off
echo %cmdcmdline%
if "%~1"=="按任意键退出" goto :%1
>"%temp%\.sub" cd.
start "" /b %0 按任意键退出
set 退格键=

for /l %%a in (10 -1 1) do (
     set /p =%退格键%%%a 秒后开始备份文件... [按任意键退出] <nul
     if not exist "%temp%\.sub" exit
     ping -n 2 127.1 >nul
)

echo,
echo 备份完成。

echo 按任意键退出...
exit

:按任意键退出
pause >nul
del "%temp%\.sub"
exit

pause
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