public virtual void Add(Rational other) {
Contract.Requires(other != null);
int newN = this.Numerator * other.Denominator + other.Numerator * this.Denominator;
int newD = this.Denominator * other.Denominator;
this.Numerator = newN;
this.Denominator = newD;
}
static void Main(string[] args)
{
var r1 = new Rational(10, 5);
Console.WriteLine("r1 truncated = {0}", r1.Truncate());
var r2 = new PositiveDenominatorRational(5, 3);
r2.Divide(-5);
var r3 = new PositiveDenominatorRational(5, 0);
var r4 = new NormalizedRational(10, 2);
r4.Divide(0);
Console.WriteLine("r1 truncated = {0}", r3.Truncate());
}
