Anybody know how to do a ping sweep in DOS and save the output?

I am a relative newbie at this and need assistance. I know that you can do a for loop in DOS by doing the following:
for /f %%i in (a text file with machine names) do ping >c:\results.txt

When I run this it seems to iterate through the file and prints the command to the .txt file. It doesn't print what machines responded... HELP!!!

Guess not...

@echo off

type nul>pass.txt

type nul>fail.txt

for /f %%a in (machines.txt) do call :ping %%a

goto :EOF

:ping

echo testing %1

ping %1|find /i "TTL=">nul

if %errorlevel%==0 echo pass&echo %1>>pass.txt

if %errorlevel%==1 echo FAIL&echo %1>>fail.txt

This a better job for WSH, but if it works great.

Try ping -a whatever

On Windows that'll report the machine name as part of the ping output.

type the following in CMD window:

for /L %z in (1,1,254) do @ping 10.200.0.%z -w 10 -n 1

explanation as follows:

(1,1,254) = starting point (last value in IP address represented by '%z'), ping increment (if you set to 10, then it will ping .10, .20, .30, etc), and 254 is ending point

the '-n1' at the end is how many times to ping an IP