Can anyone explain why this brainfuck if/else code doesn't work?

Question

// if x = y then {if_code}; else then {else_code}

,>,< / empty memory

[->-<]> / (x)'y

[>->]< / 0'(y-x)

+[
  {if_code}
  ->>
]< / {if x=y then} (0)'0; {else then} 0'y-x'(1)

[
  {else_code}
  [-]
]< / 0'(y-x)

/ empty memory

/ is to show what the memory should look like, ' is to separate values in the memory, () is used to show where the pointer is, // is for comments, and {} is for descriptions

Whenever I try to run this, no matter what I input, both the if_code and else_code is run.

I can't, but this is a very nice question for a newbie, and as I wouldn't touch brainfuck with even a very long stick, have an upvote! — GhostCat, Apr 19 '22 at 13:37
btw the comments showing the memory show the memory before that line. — user17301834, Apr 19 '22 at 13:58
my mistake I was shifting around the comments to make them more clear and ended up doing the opposite — user17301834, Apr 19 '22 at 14:07

score 5 · Accepted Answer · answered Apr 20 '22 at 06:06

5

You have at least three '-' commands hidden in your "comments".

answered Apr 20 '22 at 06:06

Daniel Cristofani

385
2
7

1

Holy I didn't notice that – user17301834 Apr 20 '22 at 15:18
1

Thanks, it was a pretty stupid mistake – user17301834 Apr 20 '22 at 15:19

Can anyone explain why this brainfuck if/else code doesn't work?

1 Answers1