/*
gcc -o scope scope1.c scope2.c scope3.c
*/

static int a;
static int b;
int c;
extern int d;

void first()
{
  printf("first:\t");
  printf("&a is %u, ",(unsigned int) &a);
  printf("&b is %u, ",(unsigned int) &b);
  printf("&c is %u, ",(unsigned int) &c);
  printf("&d is %u\n",(unsigned int) &d);
  a = '1';
  b = '2';
  c = '3';
  d = '4';
}