What is the simplest example of function used in c++

Question

C++

Answer 1

Ravi Kumar C++ course of sololearn includes very simple examples of function :
https://www.sololearn.com/learn/CPlusPlus/1635/?ref=app

Answer 2

Probably a function that does absolutely nothing:

void f() {}

I'm not sure if this helps you a lot though. ;-)

Please follow up on what you really want to know.