实现代码1

@echooff&setlocalenabledelayedexpansion

for/f"delims="%%ain('dir/b*.txt')do(

set/an+=1

ifnotexist"!n!.txt"(ren"%%a""!n!.txt")elsecall:loop"%%a"

)

pause&exit

:loop

set/an+=1

ifexist"!n!.txt"gotoloop

ren"%~1""!n!.txt"

goto:eof