@echo off&title 2008-05-07
color 1f
if "%~1"=="loop" (
  ping/n 5 127.1>nul
  if not exist z: exit
  taskkill  /f /pid %pid% >nul
  subst z: /d
  goto loop
)
subst z: "%cd%"
for /f "skip=3 tokens=2" %%a in ('Tasklist /FI "IMAGENAME eq cmd.exe"') do (
  if not defined pid set "pid=%%a"
)
start /b %~s0 loop
cls&echo.&set /p var=  请输入 
subst z: /d
taskkill /im ping.exe /f >nul
color fc
if defined var (set var=用户输入的是：%var%) else set var=用户输入的是：回车
:loop
cls
if not defined var set var=用户什么都没有输入
echo.&echo %var% 
echo.&pause&exit
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