static void Main()
{
Animal jaba = new Frog("baba jaba", 1, Genders.Female);
Animal kekerica = new Frog("kekerica", 3, Genders.Female);
Animal sharo = new Dog("sharo", 3, Genders.Male);
Animal sara = new Dog("sara", 2, Genders.Female);
Animal oldy = new Dog("oldy", 12, Genders.Male);
Animal puhi = new Kitten("puhi", 2);
Animal tommy = new Tomcat("tommy", 4);
Animal mouseKiller = new Cat("mousy", 5, Genders.Male);
List<Animal> animals = new List<Animal>()
{
jaba,
kekerica,
sharo,
sara,
puhi,
tommy,
mouseKiller,
oldy
};
var groupedAnimals = from animal in animals
group animal by (animal is Cat) ? typeof(Cat) : animal.GetType() into g
select new { GroupName = g.Key, AverageAge = g.ToList().Average(an => an.Age) };
foreach (var animal in groupedAnimals)
{
Console.WriteLine("{0} - average age: {1:N2}", animal.GroupName.Name, animal.AverageAge);
}
puhi.ProduceSound();
oldy.ProduceSound();
jaba.ProduceSound();
}
