Differences between version 14 and revision by previous author of Brainf*ck.
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| Newer page: | version 14 | Last edited on Thursday, May 27, 2004 10:18:13 pm | by DanielCristofani | Revert |
| Older page: | version 13 | Last edited on Sunday, October 26, 2003 8:55:21 am | by AristotlePagaltzis | Revert |
@@ -1,27 +1,27 @@
An interesting [ProgrammingLanguage]. It is very easy to learn, but can get extremely confusing.
-;: '' There is
someone in my head, %%% and
it is
not me. %%% %%% -- Pink Floyd, Brain damage''
+;: '' There's
someone in my head, %%% but
it's
not me. %%% %%% -- Pink Floyd, Brain damage''
-The language has 8 different commands which follow, and included is their purpose
. They use a nameless pointer to manipulate an array of (typically)
30000 cells, all initially set to . The pointer starts at the left end of the array.
+The language has 8 different commands. They use a nameless pointer to manipulate an array of at least
30000 cells, all initially set to . The pointer starts at the left end of the array.
; + : Increment the value of the current cell by 1
; - : Decrement the value of the current cell by 1
; . : Print the current cell as a character to standard output [stdout(3)]
-; , : Read a value from standard input to the current cell (these two use ASCII)[stdin(3)]
-; > : Move the pointer to the next
cell
-; < : Move the pointer to the previous
cell
-; [ : Start of a loop.
This essentially
is a while loop which will keep iterating until
the current
cell equals zero
. ie. while(x) { }
-; ] : End of the while loop. Anything
between these two language constructs
will get executed whilst the while loop executes.
+; , : Read a value from standard input to the current cell (these two use ASCII, with ten as newline
) [stdin(3)]
+; > : Move the pointer right one
cell
+; < : Move the pointer left one
cell
+; [ : Start of a loop. This is essentially
a while loop which will keep iterating while
the pointer points to a nonzero
cell.
+; ] : End of the while loop. The sequence
between the square brackets
will get executed whilst the while loop executes.
As they say about [Perl]: ''There are many ways to skin a Camel''
This also holds true for [Brainf*ck].
-Standard [Brainf*ck] thinks of every variable as an integer with a range of 0 through to 255. A variable in [Brainf*ck] is used
by the < and > instructions. For example, the code:
+Standard [Brainf*ck] thinks of every variable as an integer with a range of 0 through to 255. Different variables can be accessed
by the < and > instructions. For example, the code:
++>++++<
would mean the following:
-* Increment
the current variable by 2
+* Increase
the current variable by 2
* Move to the next variable
-* Increment
this variable by 4
+* Increase
this variable by 4
* Move to the previous variable
After this bit of code, the variable we are currently referencing has a value of 2, and the next variable has a value of 4.
@@ -32,19 +32,19 @@
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++.
+++++++++++++++>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++.+++++++..+++.>++++++++++++++
++++++++++++++++++.<<.>.+++.------.--------.
- >>+++
++++++++++.
+ >>++++++++++.
A big archive of brainfuck programs and implementations is at http://esoteric.sange.fi/brainfuck/ .
-There's more info about the language on [this|http://www.muppetlabs.com/~breadbox/bf/] page.
+There's more info about the language on [this|http://www.muppetlabs.com/~breadbox/bf/] page and [this|http://www.hevanet.com/cristofd/brainfuck
/] page.
!!! Notes
-The language has the simple specification to ignore
any character in the program source code which is not a valid brainfuck command. This allows us to put comments in our code, as long as we make sure we do not accidentally use one of the language constructs in our comments.
+The language ignores
any character in the program source code which is not a valid brainfuck command. This allows us to put comments in our code, as long as we make sure we do not accidentally use one of the language constructs in our comments. Or comments can be placed in a [] block, at a point in the code where the pointer is known to be at a zero cell
.
-[GerwinVanDeSteeg] is planning on writing his own Compiler and an Interpreter for this language sometime in the near future. There are some
available already on the WorldWideWeb,
to find one, try [Google].
+[GerwinVanDeSteeg] is planning on writing his own Compiler and an Interpreter for this language sometime in the near future. There are many
available already on the WorldWideWeb;
to find one, try [Google].
'' I've just written one. Insomnia has its own imperatives. Here you go: [brainfux0r.ml | http://www.wave.co.nz/~glyn/brainfux0r.ml]. It is written in [Ocaml]. It has a compiler (it compiles to [C]), an imperative interpreter and a functional interpreter. The functional interpreter has an infinite Turing tape as memory. I wrote and rewrote this program several times to try out various Ocaml features. (I'm following the advice on StuffToCode.) --GlynWebster''
----
CategoryProgrammingLanguages, CategoryObfuscatedProgrammingLanguages
