Undefined behavior should not be best practice, nor clever.

Idk what you're doing but the C++ version works fine.

Yep, does not compile whatever...:

main.cpp:19:22: error: no matching function for call to 'DetermineBase'
        Assert::That(DetermineBase(log), EqualsWithDelta(M_E, 1e-12));
                     ^~~~~~~~~~~~~
main.cpp:8:8: note: candidate function not viable: no overload of 'log' matching 'std::function<double (double)>' for 1st argument
double DetermineBase(std::function<double(double)> func){
       ^
main.cpp:20:22: error: no matching function for call to 'DetermineBase'
        Assert::That(DetermineBase(log10), EqualsWithDelta(10, 1e-12));
                     ^~~~~~~~~~~~~
main.cpp:8:8: note: candidate function not viable: no overload of 'log10' matching 'std::function<double (double)>' for 1st argument
double DetermineBase(std::function<double(double)> func){
       ^
main.cpp:21:22: error: no matching function for call to 'DetermineBase'
        Assert::That(DetermineBase(log2), EqualsWithDelta(2, 1e-12));
                     ^~~~~~~~~~~~~
main.cpp:8:8: note: candidate function not viable: no overload of 'log2' matching 'std::function<double (double)>' for 1st argument
double DetermineBase(std::function<double(double)> func){
       ^
1 warning and 3 errors generated.

Fixed.

good point

I think it's undefined behaviour to modify a value more than once between sequence points.
see https://port70.net/~nsz/c/c11/n1570.html#6.5p3

Does not compile even with solution. C++

ok

I've edited how k was generated, it should be fixed now for both C and C++. Mark as resolved if it is.

k should be less than n because the balls are numbered from 0 to n - 1.
C++ has also the same problem.

Where does it say i have to return -2 if k and n are equal?

Please fix the c version

@danderle ..

• That's what i've bet , Unfortunately
• The C Translator has been inactive for pretty long time , I've mentioned him 1 month ago Check Here, also (You can see Below , another issue raised concerning C Translation hasn't been resolved Yet )
• So if you could translate it into C Language and Leave me a link with it so i can approve and overwrite the current bugged one I'll be grateful .. Tuned .. Regards .. Zizou

Its in C

@danderle ..

• Well , thanks Bro for pointing out , I Think You've attempt the kata either in C or C++ but the odd thing is Both of them has been completed 16 and 42 Times Without an issue raised
• So for more help , Could you please name the language that you've attempt in letting me mention its translatoe to fix the problem
• I'm tuned to hear your feedback .. Hope you all the best .. Regards .. Zizou

Getting a 0 as Input