Very interesting, thank you!
I translated the kata into C++.

The C++ translation uses a custom Vector structure hidden in the preloaded header.
This makes solving this otherwise straightforward kata a bit unpleasant and more complicated than it is.
Either the description or the solution set up should contain the structure declaration.

This was a really interesting kata, I just translated it into C++.
The way C++ handles Unicode made it a bit more challenging than Javascript (more fun).

A good kata with a bearly understandable description.
Like others said here, read the Wikipedia page before you start coding.

This means that also my solution to the original Javascript kata is wrong... I fixed that too

I think that one of them is clearly wrong, to pass it I hardcoded the specific test case.
This killed the joy of seeing the K-Means algorithm decoding that last message.

Oops I didn't see it, sorry for that... fixed. Why does it matter? I thought it was testing that the two terms were equal.

Thank you again, I have revised the code and the tests, and I have also corrected another translation I made from Javascript to C++ along the same principles.

I learned a lot by doing this, thank you!
Personally I found it a bit hard, I'd say harder than the Google interview.

I corrected these points, and checked with -Wall -Wextra any remaining diagnostic warning. The translation should be fine, however my compiler doesn't flag a missing #include and I may be missing something else.
Thank you for your feedback, I learned a lot about writing the test cases and will use this in my next translation.
Unfortunately there isn't much documentation about c++ testing, I followed the example of some katas I solved but they are of variable quality.

Thank you! I've added random testing and fixed undeclared identifiers.
I used strings for input because the Javascript version was accepting those, it doesn't make much sense in C++ though, and I changed it to long long.

This is nice, a first step into supervised learning.
I added a translation in C++.

This was quite interesting, I like katas about number theory.
I just added a translation into C++.