@integral: I had a similar issue (in Clojure). The problem was, that my return value was not 1.2125, but something like 1.212500000000000001234 (which still was printid out like 1.2125).
So, you can try the following: printf("%f", going(n) - 1.2125), and see if you get anything else than zero.

Did you read the posts of @DrGre below? I think there could be a CW bug somewhere but 54 guys passed the C++ kata...

Thanks to "integral" calculus!-))

What do you propose?