global variable and prototype

I have two different codes here:

1)

Code:

---

#include <iostream>

                  using namespace std;

                  short Test; //This is the global variable

                  void Testing(); //This is the function

                  int main()
                  {
                  blahblahblah
                  }

---

2)

Code:

---

#include <iostream>

                  using namespace std;

                  void Testing(); //This is the function

                  short Test; //This is the global variable
             
                  int main()
                  {
                  blahblahblah
                  }

---

Which of the 2 is better? Should the global variable be placed at on top of void Testing or placed below of Testing. I tried it out and both is the same. Is there something which I don't know of? Thanks in advance!

Neither, if you can reasonably avoid the global variable. Other than that, the placement of the definition of a global variable with respect to the placement of a function declaration (prototype) does not matter.

I assume you are asking taking into account what looks better?
I would then say that if you have a big program with a lot of global variables and lost of function declarations, I would personally (others might like sth else) do this:
1) Put first the function declaration. Most likely when viewing a code you will want to check the global variables more often, so it is a good idea to be nearer main(). And it just seems more right
2) It is a good idea, in any case, to put labels. Like:
/********************
*** functions *******
*******************/
void Test();


/********************
*** global variables **
*******************/
int gb_a, gb_b;

In a "big" program, the function declarations would be in header files (perhaps within class definitions), with global variables (if any) declared extern and only defined in one source file.