echo.&echo.&echo.&echo.&echo.&echo.
echo.&set /p T3= Please type in file format what you want:
echo.&set /p T1= Please type in the characters that want to be replaced:
echo.&set /p T2= Please type in the new characters:
setlocal enabledelayedexpansion

for /f "tokens=*" %%i in ('dir /a /b *.%T3%') do (
    set "var=%%i"
    if not !var!.==. (
rem
    for /f "tokens=*" %%j in (!var!) do (
        set "tmp=%%j"
        if not !tmp!.==. (
          set "tmp=!tmp:%T1%=%T2%!"
          rem
          echo !tmp!>>temp.txt
        )
    )
    rem
    move temp.txt !var!
    )
)

echo.&echo.&echo.&echo.&echo Good, it is finished.
pause
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@echo off
set /p "T3=Please type in file format what you want:"
set /p "T1=Please type in the characters that want to be replaced:"
set /p "T2=Please type in the new characters:"
setlocal enabledelayedexpansion
for /f "tokens=*" %%i in ('dir /b /a-d *.%T3%') do (
    set "var=%%i"
    if not !var!.==. (
        (for /f "tokens=*" %%j in ('type "!var!"') do (
            set "tmp=%%j"
            if not !tmp!.==. (
                set "tmp=!tmp:%T1%=%T2%!"
                echo,!tmp!
            )
        ))>"%temp%\stage.txt"
        move "%temp%\stage.txt" "!var!"
    )
)
pause
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@echo off
for /f %%a in (" ") do echo 1[%%a]
for /f "tokens=*" %%a in (" ") do echo 2[%%a]
pause
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