c++ - Can we just have a header file for the inline global function and that means no .cpp file?

Question

I have to add a global function to my program. My global function body is quite small, so I'm thinking of using inline. As we can define the body of the inline function in the header, so to confirm, we don't need a .cpp file at all? Or I'm missing something?

inline void foo()
{
    //function body
}

I mean, can we just add that header file to other files and use that global function or .cpp file is a must as per CPP standard practice?

#include foo-header-file
foo();

I'm new to all these CPP concepts. Any guidance in the right direction will do!

question from:https://stackoverflow.com/questions/66063199/can-we-just-have-a-header-file-for-the-inline-global-function-and-that-means-no

Answer 1

we don't need a .cpp file at all

main cannot be inline, so you need at least one source file.