An easy, cheesy, but very workable way, would be to use a big if statement. 

if($command_line_switch =~ /hello/) {
  # program 1 code
}

if($command_line_switch =~ /goodbye/) {
  # program 2 code
}

[download]

NOTE:
I'm assuming that you already know how to process command line switches.

Vale!
-v
"Perl. There is no substitute."

In reply to Re: Combining two scripts with a command line switch? by Velaki
in thread Combining two scripts with a command line switch? by Seventh

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