public void TestSub3()
{
int a = 3, b = 6;
int c = NumberSystem8.Sub(a, b);
int res = -1 * int.Parse(Convert.ToString(NumberSystem8.From8To10(b) - NumberSystem8.From8To10(a), 8));
Assert.AreEqual(res, c);
}
public void TestSub2()
{
int a = 99, b = 11;
Assert.Equals(NumberSystem8.Sub(a, b), typeof(NotSupportedException));
}
