public void IncreaseBy(Rational other)
{
int den = this.denominator * other.denominator;
int num = (this.denominator * other.numerator) + (this.numerator * other.denominator);
this.denominator = den;
this.numerator = num;
}
static void Main(string[] args)
{
Rational rational1 = new Rational(1, 2);
Rational rational2 = new Rational(2, 3);
Rational rational3 = new Rational(1, 3);
Rational rational4 = new Rational(2, 5);
Console.WriteLine("Rational 1: {0}\nRational 2: {1}\nRational 3: {2}\nRational 4: {3}", rational1, rational2, rational3, rational4);
Console.Write("\nRational2 + Rational1: {0} {1} {2}", rational2, "+", rational1);
rational2.IncreaseBy(rational1);
Console.Write(" = {0}", rational2);
Console.Write("\nRational4 - Rational3: {0} {1} {2}", rational4, "-", rational3);
rational4.DecreaseBy(rational3);
Console.Write(" = {0}", rational4);
Console.Write("\nRational1 + Rational3: {0} {1} {2}", rational1, "+", rational3);
rational1.IncreaseBy(rational3);
Console.Write(" = {0}", rational1);
Console.ReadLine();
}