[greg zakharov]

Код:

@echo off
  setlocal enabledelayedexpansion
    set "i=0" % rem : аргументы
    for %%i in (%*) do set /a "i+=1"
    if !i! neq 2 goto:err
    3<"%~1" (set /p f=<&3)
    echo !f!>"%~2:s"&&type "%~2">>"%~2:s"
    more < "%~2:s" > "%~2"
  endlocal
exit /b

:err
  for %%i in (
    "=> err: not enought parameters"
    ""
    "Usage: %~n0 <from_file> <to_file>"
    ".e.g.: C:\src> %~n0 file1.txt file2.txt"
  ) do echo:%%~i
exit /b 3