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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.lang.c
Subject: Re: self-abusing C programs
Message-ID: <4317@brl-tgr.ARPA>
Date: Wed, 29-Aug-84 11:51:15 EDT
Article-I.D.: brl-tgr.4317
Posted: Wed Aug 29 11:51:15 1984
Date-Received: Tue, 4-Sep-84 08:06:26 EDT
References: <155@ihnet.UUCP>, <276@metheus.UUCP>
Organization: Ballistics Research Lab
Lines: 8

There is a whole family of self-reproducing programs that extends
quite easily to bistable, tristable, etc. groupings as well as to
self-reversing programs and any other specified transformation:

/* this file is source.c */
main(){system("cat source.c");}

This reduces most such questions to triviality.