Seter

@echo off&setlocal enabledelayedexpansion
echo 每个上一行:
for /f "delims=:" %%i in ('findstr /n ^^abcd text.txt') do set/at=%%i-2&more +!t! text.txt>tmp&set/pt=<tmp&echo !t!
echo.&echo 每个上下行&echo.
for /f "delims=:" %%i in ('findstr /n ^^abcd text.txt') do set/at=%%i-2&more +!t! text.txt>tmp&set/pt=<tmp&echo !t!&more +%%i text.txt>tmp&set/pt=<tmp&echo !t!
del tmp&pause
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