They literally connected these fridges to the internet without even changing the default password.

I just keep my KeePass file in a Nextcloud and occasionally synchronise manually via WebDAV.

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There is KeeWeb but I am not sure how well maintained it is. This issue is still open. It might be worth contacting your employers IT department instead. Asking for a well known password manager like KeePass shouldn’t raise any eyebrows.

If you have a constant expression like 1 + 2 in your code you can evaluate it at compile time once and avoid computing it at runtime. You can do that with control flow and much more complex language constructs in C++. If you want to know more about that look into C++ template meta programming, constexpr, and constval.