Thanks for the input! :) It's my first Kata and I'll try to get it done

Finally a recursive solution ;)

Where can I find references for tests in other languages (C/C++/...) ?

Hey guys, I'm passing the test but I'm always getting this:

Test Results:
backwardsPrime
ShouldPassAllTheTestsProvided
✔ Test Passed
✘ Test Crashed
Exit code: 0
Signal code: 6
STDERR:
*** Error in `/home/codewarrior/solution': free(): invalid size: 0x00007ffcf2a501a0 ***

I'm using C