And I've just managed to refactor a long file with tons of #ifdef into a hierarchy of classes, in C++, a language I have vague notions about, through the establish industry practice of copying stuff from stackoverflow.

No, the code isn't anywhere where it can be seen.

Yes, if this fails somewhere the worst that can happen is that I have to get up from my chair to know whether the temperature is higher outside or inside.

And I really needed a project where I could give myself permission to do things that only work for me, rather than having to consider other possible usecases, and possibly even to do bad things, like this one.