batch-file - Windows 批量回显倒计时

Question

我有一个带有 for 循环的脚本，但我想更改回显行，以便它包含剩余的重试次数。

以下是我的最新尝试，但我无法显示重试次数：

rem Will loop 20 times with 30 second intervals (Total 10 minutes) to confirm deletion. Loop will exit after 20 attempts and move on if dll cannot be deleted.
for /l %%i in (1,1,20) do (
set /a "count=20-=%%i"
del /f /q "%Folder2Del%file*.dll" >nul
if not exist "%Folder2Del%file*.dll" goto Folder2Del
echo/
echo File locked! Will try to delete %count% more times before exit.
timeout /t 30 >nul
)

我已经搜索并尝试应用许多示例，但我无法让它发挥作用。我不知道如何正确设置我的“计数”变量。

标签： batch-filefor-loopvariablescountcommand