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bf
UMM
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Sep 23 2000
What it does
bf is a really minimalist language. It only has 8 instructions,
with no parameters. Call it a RISC with a 3-bit instruction set if
you want.
Although very small, bf is what's called a Turing-complete
language, i.e. it belongs to the same class of programming
languages as C, C++, pascal, etc..., which means that any program
written in C++ can (theoretically) be compiled into bf,
and vice-versa.
Licence info
bf is released under the terms of the GNU General Public License, which basically means that the source file is freely available, and that everybody can read it, modify it, improve it and distribute improved versions. This also means that it comes with ABSOLUTELY NO WARRANTY
Features
- Basic functions Run it as
What does a bf program look like?
This implementation of bf uses a one-dimentional
infinite memory of 64-bit memory cells. Here are the
instructions, where p is the pointer to the current cell,
and m is the value under the pointer.
+ increments m
- decrements m
> increments p
< decrements p
. writes m to stdout (as an ascii value)
, reads m from stdout (as an ascii value)
[ starts a loop, with m as counter
] ends a loop
Here's a program (a basic implementation of Hello, World!) :
++++++++++++++++ ++++++++++++++++ ++++++++++++++++ ++++++++++++++++ ++++++++ . ++++++++ ++++++++++++++++ +++++ . +++++++ . . +++ . --------------- ---------------- ---------------- ---------------- ---- . ------------ . ++++++++++++++++ ++++++++++++++++ ++++++++++++++++ +++++++ . +++++++++ +++++++++++++++ . +++ . ------ . -------- . ---- ---------------- ---------------- ---------------- --------------- . ---------------- ------- .
Version history
- Version 0.1.1, Nov 27 1999
- Re-release under a new name, no change
- Version 0.1, Nov 25 1999
- First release