使用算术变量替换for循环中的字符串

Question

试图生成一个文件名的循环列表，从一个基本文件开始，然后循环遍历无限数量的“子”文件。例如，程序应产生：

Layout.txt
SubLayout{1}.txt
SubLayout{2}.txt
SubLayout{3}.txt
Layout.txt
SubLayout{1}.txt
etc. 

存在同名文件的地方。SubLayout{3}.txt不存在，因此循环到原始文件。我的字符串替换和算术vars的语法出了问题，很难让它工作起来。守则：

echo off
set _procRig=Layout.txt
set _sysSub=SubLayout{1}.txt

set _origRig=%_procrig%

:MainProceedureLoop
if "%_procRig%" == "%_origRig%" (
        echo Rig = Original Rig
        set _procRig=%_sysSub%
        set /a _subsubcount=1
    ) else (
    echo Rig is not the original
        set /a "_tempsubcount=_subsubcount"
        set /a "_subsubcount+=1"
        set _tempprocRig=%_procRig:{_tempsubcount}={_subsubcount}%
        echo Rig with replacement: [!_tempprocRig!]
        if exist "C:\tests\!_tempprocRig!" (
                echo Rig exists
                set _procRig=!_tempprocRig!
            ) else (
                echo Rig doesn't exist
                set _procRig=%_origRig%
            )
    )

echo Out: [%_procRig%]
pause
goto :MainProceedureLoop

我认为冒犯的底线是：

 set _tempprocRig=%_procRig:{_tempsubcount}={_subsubcount}%

原来的代码没有gotos，只是在这里作了修改，以作说明。会很感激你的帮助。

更新:背景见Magoos帖子中的评论。代码更新(仍未解决)：

echo off
setlocal enabledelayedexpansion
::Set 
set _procRig=Layout.txt
set _sysSub=SubLayout{1}.txt
set _origRig=%_procrig%
:: Stuff....
:: (_procRig can potentially change during "Stuff" - hence _origRig)
:Loop_For_Example_only
::Dummy conditional:
pause
call :Cycle_filenames
echo Return Vars:
echo _procRig: [%_procRig%]
echo _subsubcount: [%_subsubcount%]
goto :Loop_For_Example_only
exit /b

:Cycle_filenames
setlocal disabledelayedexpansion
echo --------------------------------
echo Vars In:
echo _procRig: [%_procRig%]
echo _origRig: [%_origRig%]
echo _subsubcount: [%_subsubcount%]

if "%_procRig%" == "%_origRig%" (
        echo Rig = Original Rig
        echo Syssub: [%_sysSub%]
        set _procRig=%_sysSub%
        set /a _subsubcount=1
    ) else (
    echo Rig is not the original
        echo sub: %_subsubcount%
        pause
        set /a "_tempsubcount=%_subsubcount%"
        set /a "_subsubcount+=1"
        call set _tempprocRig=%%_procRig:{!_tempsubcount!}={!_subsubcount!}%%
        echo Rig with replacement: [%_tempprocRig%]
        if exist "C:\tests\%_tempprocRig%" (
                echo Rig exists
                set _procRig=%_tempprocRig%
            ) else (
                echo Rig doesn't exist
                set _procRig=%_origRig%
            )
    )
echo Out: [%_procRig%]
endlocal && set _procRig=%_procRig%&& set _subsubcount=%_subsubcount%
goto :eof 

Answer 1

既然你已经发布了“修正”代码，那就有点难说了。你的目标还不清楚。

这条线可以改为这样，以满足你的期望：

CALL set _tempprocRig=%%_procRig:{!_tempsubcount!}={!_subsubcount!}%%

但你得取消setlocal enabledelayedexpansion的手术

Answer 2

好的。在这件事上采取了不同的策略让它发挥作用。只工作到99，但很容易修改100,1000等。

echo off
setlocal enabledelayedexpansion
::Set 
set _procRig=Layout
set _sysSub=SubLayout{1}
set _origRig=%_procrig%

:Loop_For_Example_only
::Dummy conditional:
pause
call :Cycle_filenames
echo Return Vars:
echo _procRig: [%_procRig%]
echo _subsubcount: [%_subsubcount%]
goto :Loop_For_Example_only
exit /b

:Cycle_filenames
echo --------------------------------
echo Vars In:
echo _procRig: [%_procRig%]
echo _origRig: [%_origRig%]
echo _subsubcount: [%_subsubcount%]

if "%_procRig%" == "%_origRig%" (
        echo Rig = Original Rig
        echo Syssub: [%_sysSub%]
        set "_procRig=%_sysSub%"
        set /a "_subsubcount=1"
    ) else (
    echo Rig is not the original
        echo sub: %_subsubcount%
        set /a "_tempsubcount=%_subsubcount%"
        set /a "_subsubcount+=1"
        if _subsubcount GEQ 9 (
                set _tempprocRig=!_procRig:~0,-3!
                set _tempprocRig=!_tempprocRig!!_subsubcount!}
            ) else (
                set _tempprocRig=!_procRig:~0,-2!
                set _tempprocRig=!_tempprocRig!!_subsubcount!}
            )
        echo Rig with replacement: [!_tempprocRig!]
        if exist "C:\tests\!_tempprocRig!.txt" (
                echo Rig exists
                set _procRig=!_tempprocRig!
            ) else (
                echo Rig doesn't exist
                set _procRig=!_origRig!
            )
    )
echo Out: [%_procRig%]
goto :eof