void main () {
	stdout.printf ("sizeof (double) = %lu\n", sizeof(double));
	stdout.printf ("sizeof (Double128) = %lu\n", sizeof(Double128));

	Double128 d1 = 16.0;
	stdout.printf ("Double128: 16 ^ 2 = %f\n", d1 * d1);

	double d = 1e-15;
	stdout.printf ("double: d = %e, ", d);
	d += 1; d -= 1;
	stdout.printf ("(+-1) d = %e\n", d);

	Double128 ld = 1e-19;
	stdout.printf ("Double128: ld = %e, ", ld);
	ld += 1; ld -= 1;
	stdout.printf ("(+-1) ld = %e\n", ld);

	ld = 1.234567;
	stdout.printf ("ld = %e, ", ld);
	d = ld; stdout.printf ("d = ld, ");
	stdout.printf ("d = %e, ", d);
	ld = d; stdout.printf ("ld = d, ");
	stdout.printf ("ld = %e\n", ld);
}