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Obfuscated C Contest

<programming> The International Obfuscated C Code Contest (IOCCC) is an annual contest run since 1984 over Usenet by Landon Curt Noll and friends. The overall winner is whoever produces the most unreadable, creative, and bizarre (but working) C program. Various other prizes are awarded at the judges' whim. C's terse syntax and macro-preprocessor facilities give contestants a lot of maneuvering room. The winning programs often manage to be simultaneously funny, breathtaking works of art and horrible examples of how *not* to code in C.

This relatively short and sweet entry might help convey the flavour of obfuscated C:

	 /*
	 * HELLO WORLD program
	 * by Jack Applin and Robert Heckendorn, 1985
	 */
	 main(v,c)char**c;{for(v[c++]="Hello, world!
)";
	 (!!c)[*c]&&(v--||--c&&execlp(*c,*c,c[!!c]+!!c,!c));
	 **c=!c)write(!!*c,*c,!!**c);}


Here's another good one:

	 /*
	 * Program to compute an approximation of pi
	 *  by Brian Westley, 1988
	 */


	 #define _ -F<00||--F-OO--;
	 int F=00,OO=00;
	 main(){F_OO();printf("%1.3f
",4.*-F/OO/OO);}F_OO()
	 {
		    _-_-_-_
	       _-_-_-_-_-_-_-_-_
	    _-_-_-_-_-_-_-_-_-_-_-_
	  _-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	 _-_-_-_-_-_-_-_-_-_-_-_-_-_-_
	  _-_-_-_-_-_-_-_-_-_-_-_-_-_
	    _-_-_-_-_-_-_-_-_-_-_-_
		_-_-_-_-_-_-_-_
		    _-_-_-_
	 }


Note that this program works by computing its own area. For more digits, write a bigger program. See also hello, world.

[Jargon File]


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