CrLf

echo bBAathToHOMmEe | sed -r ":a;s/([a-z])([A-Z])/\2\1/;ta"
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CrLf

另类解：

@echo off & setlocal enabledelayedexpansion
%1 echo bBAathToHOMmEe | %1 cmd /c %0 : & exit /b

set "list=#ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"

for /l %%a in () do (
  choice /c %list:~1% /cs >nul 2>nul

  for %%e in (!errorlevel!) do (
    if %%e leq 26 (
      set uppercase=!uppercase!!list:~%%e,1!
    ) else if %%e leq 52 (
      set lowercase=!lowercase!!list:~%%e,1!
    ) else (
      echo !lowercase!!uppercase!
      pause
      exit /b
    )
  )
)
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CrLf

回复 3# pcl_test


    用 [char[]] 好像也行：[char[]]'bBAathToHOMmEe' ...

CrLf

@for %%a in (a-z A-Z) do @echo aAbBdD | grep -o [%%a] | gawk "ORS=s;1"
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CrLf

回复 36# happy886rr


    啊？改行了？