windows - cmd.exe 不递增 for 循环中的数字

Question

我已经兜圈子一个多小时了，谁能告诉我为什么这不起作用？

我需要创建一个文件夹数组，并使用该数组触发 robocopy 命令

@echo off
setlocal EnableDelayedExpansion
set str=%USERPROFILE%
set server=\\poppy
call set mod=%%str:C:=%server%%%
if not exist "%mod%" mkdir %mod%
set list= %mod%\Documents %mod%\Downloads
set counter=0
(for %%a in (%list%) do (
    echo.%%a
    set counter=counter+1
    echo.%counter%
))
pause

无论我尝试什么，我都无法增加计数器:-(

Answer 1

@echo off
setlocal EnableDelayedExpansion
set "str=%USERPROFILE%"
set "server=\\poppy"
call set "mod=%%str:C:=%server%%%"
if not exist "%mod%" mkdir %mod%
set "list= %mod%\Documents %mod%\Downloads"
set counter=0
setlocal enableDelayedExpansion
(for %%a in (%list%) do (
    echo.%%a
    set /a counter=counter+1
    echo.!counter!
))
endlocal
pause

有关更多信息，请查看 - http://blogs.msdn.com/b/oldnewthing/archive/2006/08/23/714650.aspx

对于 SET 的算术运算，您需要 /A 开关。