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

void third()
{
  printf("third:\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 = '9';
  b = '0';
  c = '+';
  d = '-';
}