Why's initializing a global variable with return value of a function failing at declaration,but works fine at file scope?

Question

An 80k reputation contributor R.. told me on SO that we can\'t initialize global variables with the return value of a function as that\'s not c

Answer 1

You can maybe think of it like this: when main() starts, all global variables must already have their initializer values. And they can't, as you've been told, get those by calling functions since main() is really where execution starts, in a C program.