Comments on: polyglot programming http://www.haibane.info/2007/04/28/polyglot-programming/ a celebration of science fiction, anime, and geek culture Tue, 06 Jan 2009 20:39:36 +0000 http://wordpress.org/?v=2.6.5 By: fledgling otaku http://www.haibane.info/2007/04/28/polyglot-programming/#comment-982 fledgling otaku Sat, 28 Apr 2007 09:07:56 +0000 http://www.haibane.info/2007/04/28/polyglot-programming/#comment-982 Steven, that is called a _quine_ - check out "the original post":http://scienceblogs.com/goodmath/2007/04/true_pathology_a_multilingual.php and comments at Good Math, Bad Math for many more examples. There's even an entire programming language where "the only way to loop is to quine the program":http://scienceblogs.com/goodmath/2006/11/friday_pathological_programmin_5.php! Cool but esoteric :) Here's <a href="http://www.nyx.net/~gthompso/quine.htm" rel="nofollow">a link to quines</a> in all the major programming languages. And here's a simple quine in C: <code>#include<stdio.h> main(){char*c="\\\"#include<stdio.h>%cmain(){char*c=%c%c%c%.102s%cn%c; printf(c+2,c[102],c[1],*c,*c,c,*c,c[1]);exit(0);}\n";printf(c+2,c[102],c[1],*c,*c,c,*c,c[1]);exit(0);}</code> Steven, that is called a _quine_ - check out “the original post”:http://scienceblogs.com/goodmath/2007/04/true_pathology_a_multilingual.php and comments at Good Math, Bad Math for many more examples. There’s even an entire programming language where “the only way to loop is to quine the program”:http://scienceblogs.com/goodmath/2006/11/friday_pathological_programmin_5.php! Cool but esoteric :)

Here’s a link to quines in all the major programming languages. And here’s a simple quine in C:

#include
main(){char*c=”\\\”#include%cmain(){char*c=%c%c%c%.102s%cn%c;
printf(c+2,c[102],c[1],*c,*c,c,*c,c[1]);exit(0);}\n”;printf(c+2,c[102],c[1],*c,*c,c,*c,c[1]);exit(0);}

]]> By: Steven Den Beste http://www.haibane.info/2007/04/28/polyglot-programming/#comment-981 Steven Den Beste Sat, 28 Apr 2007 09:01:20 +0000 http://www.haibane.info/2007/04/28/polyglot-programming/#comment-981 There was a C program I saw about 30 years ago which, when compiled and run, would print out its own source. That's a hell of a lot tougher than it sounds. The trick in that case was careful (ab)use of macros. There was a C program I saw about 30 years ago which, when compiled and run, would print out its own source.

That’s a hell of a lot tougher than it sounds. The trick in that case was careful (ab)use of macros.

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