[其他] 批处理局部变量获取的问题

@echo off
setlocal EnableDelayedExpansion
setlocal ENABLEEXTENSIONS
setlocal
set /a m=0
set /a n=5
call :EchoN
set n=%errorlevel%
echo !m!
echo !n!
endlocal
exit /b
@echo on

:EchoN
setlocal
set /a n=2
for /l %%a in (1,1,5) do (
  set /a n=!n!*2
)
set /a m=!n!
endlocal&exit /b %m%
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@echo off
setlocal EnableDelayedExpansion
setlocal ENABLEEXTENSIONS
setlocal
set /a m=0
set /a n=5
call :EchoN
echo !m!
echo !n!
endlocal
exit /b
@echo on

:EchoN
set /a n=2
for /l %%a in (1,1,5) do (
  set /a n=!n!*2
)
set /a m=!n!
exit /b 0
复制代码

@echo off
setlocal EnableDelayedExpansion
setlocal ENABLEEXTENSIONS
setlocal
set /a m=0
set /a n=5
call :EchoN
set n=%errorlevel%
echo !m!
echo !n!
endlocal
exit /b
@echo on

:EchoN
setlocal
set /a n=2
for /l %%a in (1,1,5) do (
  set /a n=!n!*2
)
set /a m=!n!
for /f "delims=" %%a in ("m=!m!") do endlocal&set "%%a"
exit /b
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:EchoN
setlocal
set /a n=2
for /l %%a in (1,1,5) do (
  set /a n=!n!*2
)
(
  endlocal 
  set m=%n%
)
exit /b 0p
复制代码