Obfuscated C Code

• Binary Display -- A obfuscated but useful binary display program.
• BlackJack -- An obfuscated Blackjack program.
• Morse Code -- Converts the standard input into morse code. Also, the source is mostly a bunch of DAH DIT DAH ... etc. which spells out a message in morse code.
• Twelve bugs -- Output is a parody of "the twelve days of christmas."
• Smile -- Outputs a cute picture.
• Pictures -- Outputs a stream interesting patterns on your ghostview displayer. I don't know how to describe exactly what this program does. You'll just have to play around with it a bit.
• Pig Latin -- An English to pig-latin translater. The source code is written in pig-latin and the layout is in the shape of a pig's head.
• Rule Abuse -- 95 percent of the source is one long comment that contains nothing but seemingly random braces and a few semi-colons. But these braces and semi-colons are very precisely placed for if you use the source as input to the program, these braces and semi-colons become ... Just try it.
• Types Parser -- Returns the type of an arbitrarily complicated C type given as input (not on the command line.) E.g. ptr to function of array of ptr returning ... Very short and useful.
• Babble -- An implementation of Charles Babbage's Analytical Engine that computes factorials, GCDs, and computes a factor of a number.
• Adder -- Adds two numbers. What's so clever about that? Check out the source layout! It consists of variations of the word "main" repeated over and over and placed in the shape of a circuit diagram for a half-adder. Which is exactly what the program does; it adds by carrying out the indicated logical bit operations.
• E -- Computes a desired number of digits of e in any desired base.
• E -- Another obfuscated program to calculate digits of e. (not from the Contest)
• Pi -- A unique program layout and the most unusual method of calculating pi I have ever seen. The source code is a circle and the program works by calculating its own area and diameter, and then doing a division to approximate pi!! Very bizzare.
• Primes -- Prints out prime numbers. Almost all of the work is done in the preprocessor!
• Factorial -- Calculates arbitrarily large factorials very quickly.
• Factor -- Factors large integers rather quickly.
• Rot13 filter -- One line filter which shifts each character 13 places in an alphabetic cycle.
• Palindrome -- Every source code line is a palindrome!
• Flipper -- Takes a text file and reflects it across the upper-left to lower-right diagonal. Running this program on the source file produces a program that works exactly like the original! As a bonus, a 'secret' message becomes visible in the flipped version of the program.
• Hello World -- An obfuscated version of the classic 'hello world' program.
• She loves me, she loves me not, ... -- You must see the source code layout to appreciate this; it reads just like a series of letters exchanged between charlie and charlotte. This is extraordinary!
• Alphabetize -- The inputs get printed character by character in alphabetical order. Short and obscure.
• Magic Squares -- Prints out a different magic square during successive runs. Works for both even and odd orders.
• Maze -- Produces a random maze. Very short and obscure. (not from the Contest)
• Maze Rat -- A game where you have to solve the maze from the rat's eye point of view. The maze has enough symmetry that you feel like you are going in circles forever even when you aren't.
• 3-D Maze -- Solve a 3-D maze. This game is actually fun to play!
• Obscure -- Short, extremely obscure program which runs only on the Vax-11 and PDP-11.
• N Queens -- 240 character program which solves the n-queens problem with chessboard output.
• Puzzles -- Short program for solving the towers of hanoi and chinese ring puzzles.
• Hanoi -- Program that "solves" the towers of hanoi puzzle. Actually ALL the work is done in the preprocessor so that the program doesn't really solve the puzzle, the compiler does! The preprocessor generates code for a single printf statement with one long string which is the solution. The resulting program does nothing except print out the solution.
• Othello -- Extremely compact. Has 11 playing levels. Determines its move via minimax search with alpha-beta pruning with an evaluation function that depends largely on mobility. All this in only 1K!! and it plays a good game of othello to boot!
• Subsets -- One liner which produces all proper subsets of the set or arguments passed to it.
• Differential Equations -- Numerically solves differential equations via the Range-Kutta method. Also, contains a reversing filter. Not impressed? There's more. Use the reversing filter on the source code to produce another program which is a shell sort! (the shell sort has its own reversing filter to reproduce the original). There's still more. Using the sort program on the original source code produces another program which generates the fibonacci numbers! This is astonishing!
• Typing Test -- Produces a string by using pointers to functions that return a struct of pointers to functions. Very obscure source.
• Where Are You? -- Enter longitude and lattitude and this will print out a map showing your location. Extremely short program.
• Christmas -- Obfuscated program whose output is Christmas related.
• Christmas -- A short program with Christmas related output.
• BASIC -- A BASIC interpreter, complete with a lunar landing program.