find algorithm/solution

[frek]

I got your solution. :) And thanks for your talks. They were useful.
What complete compileable program to test do you suggest, please?

[lastchance]

frek wrote:

What complete compileable program to test do you suggest, please?

Besides your single function you need to supply the headers and the int main() so that we can compile and run your code as a whole (ideally, in the online compiler here).