static void Main()
{
// Animal an00 = new Animal("animal", 99, Sex.Male); //- it is not possible to initialize Animal - the class is abstract
Frog an01 = new Frog("Jabka", 1, Sex.Female);
Console.Write("sound of a frog is:");
an01.Makesound();
Dog an02 = new Dog("Balkan", 5, Sex.Male);
Console.Write("sound of a dog is:");
an02.Makesound();
Cat an03 = new Cat("Muro", 2, Sex.Male); // Cat could be male or female
Cat an04 = new Cat("Izabela", 4, Sex.Female); // Cat could be male or female
Console.Write("sound of a cat is:");
an04.Makesound();
Kitten an05 = new Kitten("Chochi", 2); //Kitten is alwais female
Console.WriteLine("Kitten's sex is {0}", an05.Sex);
Console.Write("sound of a kitten is:");
an05.Makesound();
// an05.Sex = Sex.Male; //It is not possible to access/change the sex of an Animal
Tomcat an06 = new Tomcat("Gosho", 5);
Console.WriteLine("Tomcat's sex is {0}", an06.Sex);
Console.Write("sound of a tomcat is:");
an06.Makesound();
Dog an07 = new Dog("Lara", 8, Sex.Female);
Dog an08 = new Dog("Sharo", 3, Sex.Male);
Frog an09 = new Frog("Cermit", 2, Sex.Male);
Kitten an10 = new Kitten("Suzi", 5);
Tomcat an11 = new Tomcat("Tom", 2);
Frog[] frogs = { an01, an09 };
Console.WriteLine("The average age of frogs is {0:f2}", Animal.AverageAge(frogs)); //Static method in class Animal
Console.WriteLine("The average age of frogs calculated by lambda is {0:f2}",frogs.Average(x=>x.Age));
Dog[] dogs = { an02, an07, an08};
Console.WriteLine("The average age of dogs is {0:f2}", Animal.AverageAge(dogs));
Console.WriteLine("The average age of dogs calculated by lambda is {0:f2}", dogs.Average(x => x.Age));
Cat[] allKindOfCats = { an03, an04, an05, an06, an10, an11};
Console.WriteLine("The average age of all kind of cats is {0:f2}", Animal.AverageAge(allKindOfCats));
Console.WriteLine("The average age of all kin of cats calculated by lambda is {0:f2}", allKindOfCats.Average(x => x.Age));
Console.WriteLine();
//Mix array
Animal[] allAnimals = { an01,an02,an03, an04,an05, an06, an07, an08, an09, an10, an11};
//split mixed aray to groups
var groups = from kind in allAnimals
group kind by kind.GetType() into species
select species;
//calculate and print average age by groups
foreach (var item in groups)
{
Console.WriteLine("Kind ->{0, -10}; Average age ->{1:f2}", item.Key.Name, item.Average(x => x.Age));
}
}