Try harder.

You can come over gitter.im/iaeliyen for having a discussion on this problem.

1. Include the code in backticks.:

'''

Code

'''

^^

Just like this, but you have to replace the those ' with a backtick ~(without shift),
then your code would be like this:

code

2. In c++, the functions are class methods, you've stripped out the classes, though there was error with the answer when I ran your code in C environment.
3. There is much shorter and concise way to solve this problem.

sure, but with spoiler tag.

Language?

By checking the output yourself for small numbers.