问将周围的行返回到字符串windows批处理文件

EN

@echo off
setlocal enabledelayedexpansion
for /f "tokens=1 delims=:" %%a in ('findstr /n "hello" file.txt') do (
set /a line=%%a
)
set /a num=0
for /l %%b in (3,-1,1) do (
set /a lines[!num!]=!line!-%%b
set /a num+=1
)
for /l %%c in (1,1,3) do (
set /a lines[!num!]=!line!+%%c
set /a num+=1
)
set /a count=1
for /f "tokens=* delims=" %%d in (file.txt) do (
for /l %%e in (%lines[0]%,1,%lines[5]%) do (
if !count!==%%e if not %%e==!line! echo %%d
)
set /a count+=1
)
pause >nul