求一个脚本，带时间戳的

想在win7里面运行一个ping脚本，结果能够输出文件并记录时间戳，方便查看

@echo off

set DATE=%date:~0,4%_%date:~5,2%_%date:~8,2%
set TIME=%time:~0,2%_%time:~3,2%_%time:~6,2%_%time:~9,2%
set FILE=!DATE!_!TIME!.txt
rem echo %FILE%

set HOST=%1
if "%HOST%" == "" (
    set HOST=www.baidu.com
)

echo ping %HOST% to %FILE%
echo ping %HOST% to %FILE% > %FILE%
ping %HOST% >> %FILE%