lvsehuaxue

如果一行中含有多个a的话，9楼也不通用

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%. in (a.txt) do (
   set "str=%%."
   set "str1=!str:a= !"
   for %%i in (!str1!) do set "var=%%i"
   call set "str=%%str:!var!=%%
   set "str=!str:0=!"
   echo !str!!var!
)
pause
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