[文本处理] [已解决]求助，帮忙改进一下这个抽奖的批处理代码

@echo off
setlocal enabledelayedexpansion
cd /d f:\chou
for /l %%i in (1,1,100) do (
    ping 192.168.0.%%i -n 1 -l 20 -w 20 &&echo %%i >>test.txt
)
echo 系统正在抽奖中
echo.
echo.
echo.
for /f "delims=: tokens=1,2" %%j in ('findstr /n . test.txt') do (
     set n=%%j
)
set /a m=!random!%%%n%+1
set /a o=!random!%%%n%+1
set /a p=!random!%%%n%+1
for /f "delims=: tokens=1,2" %%a in ('findstr /n . test.txt') do (
    if %m%==%%a echo 恭喜%%b获得10元网费
    if %o%==%%a echo 恭喜%%b获得10元网费
    if %p%==%%a echo 恭喜%%b获得10元网费
)
@pause
echo.
echo.
echo.
echo  按任意键退出
del test.txt
复制代码