public void ParseTest()
{
Rational r;
r = Rational.Parse("-12/30");
Assert.IsTrue(r.CompareTo(new Rational(-12, 30)) == 0);
r = Rational.Parse("123");
Assert.IsTrue(r.CompareTo(new Rational(123)) == 0);
r = Rational.Parse("1.125");
Assert.IsTrue(r.CompareTo(new Rational(9, 8)) == 0);
}
static void ShowParse(string s)
{
Console.WriteLine("Parse \"{0}\" to Rational: {1}",
s, Rational.Parse(s));
}