functions anywhere? (in the module)

[Mnemonist]

Firstly, Hi to the board!

Can anyone tell me what is wrong with this code? I have read that "A function can be defined anywhere in the module".
Although when I define the same function before the main function, it works when I call it.

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;

int main(int nNumberofArgs,
 char* pszArgs[])
{
       void hello()
       {
            cout << "hello" << endl;
       }
       hello();
       system("PAUSE");
       return 0;
}

When I try to compile and execute I get the message...
Line 9: expected primary-expression before "void".

This works fine...

#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;
void hello(void)
       {
            cout << "hello" << endl;
       }
int main(int nNumberofArgs,
 char* pszArgs[])
{
       
       hello();
       system("PAUSE");
       return 0;
}

Any help would be greatly appreciated. Thanks!