qixiaobin0715

@echo off
setlocal enabledelayedexpansion 
for /f "tokens=1*" %%i in (1-1.txt) do (
    set /a n+=1
    if !n! equ 4 set NFN=%%i
)
ren "1-1.txt" "!NFN!.txt"
pause
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qixiaobin0715

使用临时文件+“伪循环”也可：

@echo off
findstr /n .* 1-1.txt|findstr /b "5:">temp
for /f "tokens=2 delims=:	 " %%i in (temp) do ren "1-1.txt" "%%i.txt"
del temp
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qixiaobin0715

回复 12# meiszp
如果分隔符只有制表符和空格，delims参数省略即可。