OP solved it, closing

i had an issue with static variables in lambdas for this kata.
in VC++ and MinGW locally it doesn't behave as globally static, where here it does.
e.g.
std::for_each({static bool something = true})// locally, something is set to true for each test case. on codewars, it is set once.

use double precision

The tests could result in a segfault which would "fail silently". Apart from that, it's impossble to tell if there's any issue from this comment.

Same problem here in C++, looks like the tests exit silently :/

95 guys passed the C++ kata.
When you ask for an answer post a question, not an issue.