@echo off
set str1="CAD系统课"
set str2="CAD系统课0"
for /f "delims=" %%a in (新建文本文档.txt) do (
    set "str=%%~nxa"
    ren "%%a" "!str:%str1%=%str2%!"
)
pause
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@echo off
setlocal enabledelayedexpansion
set str1=CAD系统课
set str2=CAD系统课0
for /f "delims=" %%a in (新建文本文档.txt) do (
	set  "var=%%a"
        set  "var=!var:%str1%=%str2%!"
	echo !var!>>新文件.txt
)
pause
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@echo off
setlocal enabledelayedexpansion
set str1=CAD系统课
set str2=CAD系统课0
for /f "delims=" %%a in ('dir /a-d /b *.mp4') do (
	set  "var=%%a"
        set  "var=!var:%str1%=%str2%!"
        ren "%%a" !var!
)
pause
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@echo off
for /f "tokens=1,2* delims=课讲" %%i in (1.txt) do (
	echo %%i0%%j%%k >>2.txt
	)
pause
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