Puzzle SL28

Rule 3.1 and 3.2

What does the following write to the monitor?

---

/* --- fileA.c --- */
int x = 8;

---

 
/* --- fileB.c --- */
#include <stdio.h>

static int x = 444 ;

void foo()
{
  printf("x in fileB: %d\n", x );
  x = 25;
  printf("x in fileB: %d\n", x );
}

---

 
/* --- fileC.c --- */
#include <stdio.h>
void foo();

extern int x ;
void main()
{
  printf("x before foo: %d\n", x );
  foo();
  printf("x after  foo: %d\n", x );
}

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As usual, pay attention to how many x's there are and where they are visible.