This a a javascript program that uses the concept of self description when adding two numbers.

Quine.js

/*	Author: Corey Stubbs	cas5542 (AT) gmail [DOT] com
 *	Date: 	11/12/2012
 *	About: 	This a a javascript program that uses the concept of self description when adding two numbers. 
 *			The main purpose of this program is found within the addTwo function of Program. The function
 *			will add the two numbers, a and b, iff the third parameter, string, is the string encoding of Program.
 *			If string is not the encoding, the function will always return 0. Very strange, I know, but this is a 
 *			very important concept in computer science and is made possible via	the recursion theorem. This
 *			particular kind of program is know as a quine. I have provided two links in regards to recursion 
 *			theorem and quines. If you have any questions let me know!
 *
 *			Recursion Theorem: 	http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-045j-automata-computability-and-complexity-spring-2011/lecture-notes/MIT6_045JS11_lec10.pdf
 *			Quine Link: 		http://en.wikipedia.org/wiki/Quine_(computing)
 *
 *	To Run: If you have nodejs installed, simply run 'node Quine.js'. If not, copy this file into the developer 
 * 			tools console of chrome and go from there.
 */

/****************************
*	Begin Quine Program		*
*****************************/
function Program(){
	var self = this;
	var me = [
		'function Program(){\n',
		'var self = this;\n',
		'\tvar me = [\n',
		'\t]\n',
		'\t\n',
		'\tself.PrintSelf = function(){\n',
		'\t\tvar returnVal = "";\n',
		'\t\tfor(var i = 0; i < 3; i++){\n\t\t\treturnVal += me[i];\n\t\t}\n',
		'\t\tfor(var i = 0; i < 20; i++){\n\t\t\treturnVal += "\'" +  me[i].replace(/\t/g,\'\\t\').replace(/\n/g,\'\\n\') +"\',";\n\t\t}\n',
		'\t\tfor(var i = 3; i < 20; i++){\n\t\t\treturnVal += me[i];\n\t\t}\n',
		'\t\treturn returnVal;\n',
		'\t}\n',
		'\tself.addTwo = function(a,b, string){\n',
		'\t\tif(string !== self.PrintSelf()){\n',
		'\t\t\treturn a+b;\n',
		'\t\t} else{\n', 
		'\t\t\treturn 0;\n',
		'\t\t}\n',
		'\t}\n',
		'};\n',
	]

	self.PrintSelf = function(){
		var returnVal = "";
		for(var i = 0; i < 3; i++){
			returnVal += me[i];
		}
		for(var i = 0; i < 20; i++){
			returnVal += "\t'" + me[i].replace(/\t/g,'\\t').replace(/\n/g,'\\n') +"',\n";
		}
		for(var i = 3; i < 20; i++){
			returnVal += me[i];
		}
		return returnVal;
	}
	self.addTwo = function(a,b, string){
		if(string !== self.PrintSelf()){
			return a+b;
		} else{
			return 0;
		}
	}
};
/****************************
*	End Quine Program		*
*****************************/

/****************************
*	Begin Test Program		*
*****************************/
var testPogram = new Program();
console.log(testPogram.PrintSelf());
console.log(testPogram.addTwo(1,2,"test"));
console.log(testPogram.addTwo(1,2,testPogram.PrintSelf()));
/****************************
*	End Test Program		*
*****************************/