How do I know the FPS in my application?

Question

C++ / C#

Hello, dear users of the site toster.ru. I have a question, how to calculate the FPS of my application and limit it (using C++ and SDL2)?
Please do not just give the code, but explain how it works.

Answer 1

In this video tutorial (in broken English) the author explains how to control FPS in SDL. With sources.

Answer 2

Or maybe even dance?
Write how you suppose it can be done, what did not work out - and they will help you!

Answer 3

The simplest thing is to draw by time. Start a timer that knows when to draw next time, ask it with some frequency if the time to draw has come, if yes - draw and set the next timestamp, if not - do nothing.