Brainfuck has become my new hobby. my average number of migraines per minute has skyrocketed. anyway, i decided i'd share some of my programs if anyone's interested. i'll edit in more as i go. if you program in brainfuck and want to add in a few, i'd gladly post them and give credit.

Addition
adds the first memory slot to the second
,>,<[>+<-]

Addition
adds the first memory slot to the second outputs the answer
,>,<[>+<-]>>++++++[<-------->-]<.

Subtraction
subtracts the second memory slot from the first
,>,[<->-]<.


i'll definitely add more later as i become familiar with the language

I am fairly certain there are errors in this program but there is no freaking way I am going to debug it. anyway it is a xp calculator for stick adventures online written in brainfuck. It takes lvl for input and outputs the answer as an ascii character (or at least thats what it would do if it actually worked)

>+++++++++++++++[>>>>>+>+<<<<<<-]>>>>>
>[<<<<<<+>>>>>>-]+++++<<[-]<[-]<[-]<,----------
-------------------------------------->[<->++++++++++][<
+>-]<>,------------------------------------------------[<+>-]
<[>+>+<<-]>>[<<+>>-]<<[>>>>[<<<+>>>-]<<<[
>>>>[<<<+>+>>-]<<[>>+<<-]<[>+<<-[>>-<<]>>[
<-[>>-<<[-]]+>-]<-]>>+<<<]>>>>>[<<<<<+>>>>>
-]<<<<<[>>>>>+>+<<<<<<-]>>>>>>[<<<<<<+>>
>>>>-]+++++<<<<<-]+++++++++++++++++++++
+++++++++++++++++++++++++++++++++++++
+++++++.>.

thats the most complex bf program I have ever written.

@DJ:
http://www.49-6-dev.net/takingovertheworlden.htm
http://jonripley.com/brainfuck/games/

* DJ Omnimaga also hopes that Brainfuck becoming Nemo's new hobby doesn't mean the end of his calculator hobby

Worry no more. Now you can combine brainfuck with your calculator.

prgmBRAINFCK
Language is exactly like the real thing, ignores formatting and illegal characters. $0A is even new line. On compile, it only includes the subroutine that you need, the text input is like 50 bytes so you don't always want that.

Here are the specifics to make a source file. The first two characters must be "BF". Then there is an optional comma indicating safe mode (more info later). Finally the name of your program followed by an enter. That's it! Now go program to your heart's content.

Then to get it to compile. Store your source name in string 1. Then just run prgmBRAINFCK. It even warns you if you have different amounts of ['s and ]'s.

The safe mode I added is so that your programs will never clear ram. It puts a little subroutine before every ] that checks for ON presses.

Enjoy.

It uses appBackUpScreen. So as long as you don't do +[>[-]+]. You shouldn't have any problems.

Does it start at the beginning or in the middle?  Like if we move back 1, are we out of the appBackUpScreen?  Oh and epic program

Silly fix. You couldn't turn your calculator off if you used the key input.

Supporting extra characters is super easy. I currently have a big list of (cp xx \ jr nz, next)'s that I use. The finished product is output in pure assembly so it's size all varies with what you want. Very unoptimized assembly I might add. (32 straight inc (hl)'s in some cases)

The program starts right at the beginning of appBackUpScreen. If you need more space, use a whole bunch of >'s.

Here is a program that takes a 1 digit input, squares it, and outputs the 2 digit result.
:BF,AA
:,----- ----- ----- ----- ----- ----- ----- ----- ----- ---
:[
:>+
:>+
:<<-
:]
:>
:[
:>
:[>+>+<<-]
:>
:[<+>-]
:<<-
:]
:>>+++++ +++++.
:>[>+<-]     ;hex to decimal starts here (after the >), give it the number in (current) and it will output the result
:>
:>+++++ +++++
:<
:[
:>
:[>+>+<<-]
:>
:[-<<-[>]>]
:>
:[<<+>>-]
:>+
:<<<<
:]
:+++++ +++++
:>[<->-]<
:[>+<-]
:+++++ +++++ +++++ +++++ +++++ +++++ +++++ +++++ +++++ +++
:[>+>>>>+<<<<<-]
:>>>>>.<<<<.
:>+++++ +++++.

There's a hex to decimal converter in there. It just can't accept numbers that end in 0. 20 is 1:.

Edit:
   Forgot to attach program. Source's there too if you want it.

Wow, that's neat.  Excellent job The Penguin!