// A name is an address.
// Context are the set of addresses that a program can access


main()
{
	int x = 0;
	int y = 4;
	printf("%x %x\n", &x, &y);	
	foo(&y);
	printf("%d %d\n", x, y);
}




int foo(int *yp)
{
	int *a[100];
	int z;
	int fd = open("/tmp/bar");
	printf("%x\n", yp);
	*(yp+1) = 10;
}