Simple interpreter for brainfuck
To set up, run:
$ mkdir bin/ && make compile
This will create the main executable under ./bin/compile.
Then, interpret your code with:
$ ./bin/compile your_code.bf
There are some examples under input/ you can try out (some stolen from wikipedia).
Here's a program that adds 6 to 3 and outputs the result:
$ cat input/add_nums.bf
+++++++++++++++++++++++++++++++++++++++++++++++++++>++++++<[->+<]>.
Breakdown: we do 51 increments to get to ASCII '3', then 6 increments in the next slot to get to 6 (decimal). So our memory looks like:
data 51 6
location 0 1
Then we enter a loop, continuously decrementing at location 0 and incrementing at location 1 until location 0 is 0 (char \0), at which point location 1 should have '9'.
$ ./bin/compile ./input/add_nums.bf
9
Another program that prints "hello world" - this one's a bit harder to trace through.
$ ./bin/compile input/hello_world.bf
H
e
l
l
o
W
o
r
l
d
!
Prompt user for 5 input characters and echos it back to you:
$ ./bin/compile input/user_in.bf
a
b
c
d
e
a
b
c
d
e