//////////////
// main.cpp //
//////////////

#include <stdio.h>

int newFoo(int i);
void printFooNum();

static int foos[] =
{
    newFoo(1),
    newFoo(2),
    newFoo(3),
    newFoo(4)
};

int main()
{
    printFooNum();
    printf("\n\nThe program has ended..\n"); fflush(stdin); getchar();
    return 0;
}

/////////////////////
// anotherFile.cpp //
/////////////////////

#include <stdlib.h>

std::vector<int> foo;

int newFoo(int i)
{
    foo.push_back(i);
    printf("Adding foo [addr: 0x%X]. New size: %d\n", &foo, foo.size());
    return i;
}

void printFooNum() { printf("foo [addr: 0x%X] size: %d\n", &foo, foo.size()); }