【语言-批处理】生成文件时，文件名变化生成（例如：yuan1.txt、yuan2.txt、yuan3.txt...）

按123生成文件.bat
::set a = 1
::for
::if exist %a%.txt() else ( echo 1>1.txt)
::if exist *.txt( del *.txt) else ( echo 不存在)
::echo %a%>%%a.txt
@echo off
set lzj=0
:begin
set /a lzj=%lzj%+1
echo %lzj%
::if %lzj% == 10 goto end
if not exist yufan%lzj%.txt goto end
goto begin
:end
echo yufan%lzj%>yufan%lzj%.txt
exit

@echo off
if exist *.txt ( del *.txt )
exit