Excuse me, I have next problem: I have got 'compilation error' twice because of using function round() from library 'cmath'. But it works normally in Code::Blocks on my PC. What is the problem and how can I substitute round function?

а что именно в сообщении об ошибке выдаёт компилятор?

941ef0f3-e7a3-4f31-a9b3-5be1b580cf1b
941ef0f3-e7a3-4f31-a9b3-5be1b580cf1b(48) : error C3861: 'round': identifier not found

> how can I substitute round function?
I'm not sure about all these tricks, but this may work:
> double d;
> int x = (int)(d+0.5);

For me round worked just fine, but last time I had used it before compiler was changed. Btw, what compiler do you use in code::blocks? GCC?

Use floor or ceil