GNU

@echo off
for /f "tokens=2 delims==" %%i in ('wmic Path Win32_NetworkAdapterConfiguration where "IPEnabled='True'" get DefaultIPGateway /value ^| findstr "="') do (
    set "gateway=%%i"
)
set "gateway=%gateway:~2,-3%"
REM echo %gateway%
for %%i in (%gateway%) do (
    set "suffix=%%~xi"
    set "prefix=%%~ni"
)
set /a next=%suffix:~1%+1
set IP=%prefix%.%next%
REM echo %IP%
ping -n 1000 %IP% > "网络质量.txt"
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