Why can't a function go after Main

Question

Why can\'t I put a function after main, visual studio cannot build the program. Is this a C++ quirk or a Visual Studio quirk?

eg.

int main()
{
   myF         


        

Answer 1

Functions need to be declared before they can be used:

void myFunction();

int main() {
  myFunction();
}

void myFunction() {
  ...
}