Tcl (Cisco) ping program.....

I'm completely new to Tcl. I'm trying to come up with a program that
will be feed a list of IP addresses on the screen, one at a time (i.e.
192.168.1.20 - 192.168.1.55) and ping each IP. The program needs to
output the success or failure of the ping. This program will be
running on Cisco equipment! I really could use some help, please. And
if anyone knows any good links or books on Tcl Programming (besides
cisco.com, I've downloaded everything they have...LOL) it would be
appreciated.

Sample Output:

---------------------------------------------------------------------------
IP Successful Ping?
---------------------------------------------------------------------------
192.168.1.20 YES
192.168.1.21 YES
192.168.1.22 NO
192.168.1.23 YES
.......

---------------------------------------------------------------------------

.

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