static void Main(string[] args)
{
Cat c1 = new Cat("c1", 1, "male");
Console.WriteLine(c1.ProduceSound());
Dog d2 = new Dog("d2", 2, "male");
Console.WriteLine(d2.ProduceSound());
Frog f3 = new Frog("f3", 3, "female");
Console.WriteLine(f3.ProduceSound());
Kitten k4 = new Kitten("k4", 4);
Console.WriteLine(k4.ProduceSound());
Tomcat t5 = new Tomcat("t5", 5);
Console.WriteLine(t5.ProduceSound());
List <Animal> animals = new List <Animal>();
animals.Add(c1);
animals.Add(d2);
animals.Add(f3);
animals.Add(k4);
animals.Add(t5);
var dogsAge =
from animal in animals
where animal is Dog
select animal.Age;
int dogsAverage = dogsAge.Sum() / dogsAge.Count();
Console.WriteLine(dogsAverage);
}
static void Main(string[] args)
{
Dog dog1 = new Dog("Jhony", 10, "male");
Cat cat1 = new Cat("Kotka", 1, "female");
Frog frog1 = new Frog("Green", 99, "male");
Kitten kitten1 = new Kitten("Pussy", 18);
Tomcat tomcat1 = new Tomcat("Tom", 22);
Dog dog2 = new Dog("Balkan", 1, "male");
Frog frog2 = new Frog("Karpat", 12, "male");
Kitten kitten2 = new Kitten("Kitenik", 22);
Dog dog3 = new Dog("StreetFighter", 5, "female");
Animal[] animals = new Animal[9];
animals[0] = dog1;
animals[1] = cat1;
animals[2] = frog1;
animals[3] = kitten1;
animals[4] = tomcat1;
animals[5] = dog2;
animals[6] = frog2;
animals[7] = kitten2;
animals[8] = dog3;
foreach (var kind in animals.GroupBy(a => a.GetType().Name))
{
double avrAge = kind.Select(a => a.Age).Average();
Console.WriteLine("Animal : {0} - AverageAge: {1}", kind.Key, avrAge);
}
}