using System;

class Pet

{

    public string name;

    public int age;

    public string breed;

    public static int totalNumberOfPets;

    public static int sumOflAllPetAges;

}

​

Console.WriteLine("How many pets do you own?");

int numberOfPets = int.Parse(Console.ReadLine());

​

Pet[] pets = new Pet[numberOfPets];

​

for (int i=0; i<numberOfPets; i++)

{

    pets[i] = new Pet();        

    Console.WriteLine("What is your pet's name?");

    pets[i].name = Console.ReadLine();

    Console.WriteLine("What is this pet's age?");

    pets[i].age = int.Parse(Console.ReadLine());

    Console.WriteLine("What is this pet's breed?");

    pets[i].breed = Console.ReadLine();

    Pet.totalNumberOfPets++;

    Pet.sumOflAllPetAges += pets[i].age;

    Console.WriteLine("That makes the pet count: " + Pet.totalNumberOfPets);

}

​

for (int i=0; i<numberOfPets; i++)

{

    Console.WriteLine("Your pet's details: ");

    Console.WriteLine((i+1) + "-" + pets[i].name + ", who is " + pets[i].age + " years old, and is a " + pets[i].breed);

}

Pet youngestPet = pets[0];

Pet oldestPet = pets[0];

​

for (int i=0; i<numberOfPets; i++)

{

    if (pets[i].age >= oldestPet.age)

    {

        oldestPet = pets[i];

    }

    if (pets[i].age <= youngestPet.age)

    {

        youngestPet = pets[i];

    }

}   

​

double averageAge = (double) Pet.sumOflAllPetAges / (double) Pet.totalNumberOfPets;

​

Console.WriteLine("The youngest pet is: " + youngestPet.name);

Console.WriteLine("The oldest pet is: " + oldestPet.name);

Console.WriteLine("The average age is: " + averageAge);