bat-wc726842270(726842270) 9:27:53 
不知道这样可以么？
@echo off
set var=123
set a=%var% 
echo %a%
pause>nul
bat-defanive(524565481) 9:30:09
这样子可以显示出来，但是不能输出到文件
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@echo off
set var=123456789
set a=%var%4
echo %a%
pause
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@echo off
set var=123456789
set a=%var%4
echo %a%
pause
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@echo off
set var=123456789
set a=%var%4
echo %a%
pause
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@echo off&setlocal enabledelayedexpansion
set n=0
set var=_____________________
set   b=
:1
set /a n+=1
if %n% gtr 21 goto :2
set c=!b:~,%n%!
set a=%var%%c%@
echo %a%
goto :1
:2
pause
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@echo off&setlocal enabledelayedexpansion
set n=0
set var=_____________________
set   b=
:1
set /a n+=1
if %n% gtr 21 goto :2
set c=!b:~,%n%!
set a=%var%%c%@
ping /n 1 127.1 >nul
cls
echo %a%
goto :1
:2
pause
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@echo off&setlocal enabledelayedexpansion
set n=0
set var=_____________________
set   b=
set col=123456789abcde
:1
set /a d=%random%%%14+1
color 0!col:~%d%,1!
set /a n+=1
if %n% gtr 21 goto :2
set c=!b:~,%n%!
set a=%var%%c%@
ping /n 1 127.1 >nul
cls
echo %a%
goto :1
:2
pause
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