Skip to main content
3 of 5
added 1 character in body
Seggan
  • 6.6k
  • 23
  • 50

Make a Brainfuck Interpreter

There already is a Brainfuck interpreter question, but it is from 2011 and not up to date with current site standards and vague in places. I have proposed reposting this in chat, and it was well-received. Here goes.

Objective

Given the Brainfuck code and the program's input as input, run the Brainfuck code. As there are various variants of Brainfuck, here is the one I will use for the challenge:

  • There are least 128 cells.
  • Cell values are positive integers, having a maximum value of at least 128.
  • Going into negative cells in undefined.
  • Going into negative numbers is undefined.
  • Going above the maximum cell value is undefined.
  • EOF is 0

You may assume that the code will conform to the above constraints and that brackets will be balanced. You may also assume that all input code will be nothing but <>,.+-[].

Testcases

"+[-->-[>>+>-----<<]<--<---]>-.>>>+.>>..+++[.>]<<<<.+++.------.<<-.>>>>+." -> "Hello, World!"

",[.,]", "abc" -> "abc"

Scoring

As this is , shortest answer in bytes wins.

Seggan
  • 6.6k
  • 23
  • 50