using System;

namespace Lab3.Step1
{
    abstract class Animal
    {
        public string Name { get; set; }
        public string Breed { get; set; }
        public string Owner { get; set; }
        public string Phone { get; set; }
        public DateTime VaccinationDate { get; set; }

        public Animal(string name, string breed, string owner, string phone, DateTime vaccinationDate)
        {
            Name = name;
            Breed = breed;
            Owner = owner;
            Phone = phone;
            VaccinationDate = vaccinationDate;
        }

       abstract public bool isVaccinationExpired();



    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Lab3.Step1
{
    class GuineaPig :Animal
    {
        private static int VaccinationDuration = 6;
        public GuineaPig(string name, string breed, string owner, string phone, DateTime vaccinationDate):base(name,breed,owner,phone,vaccinationDate)
        {

        }

        public override bool isVaccinationExpired()
        {
            return VaccinationDate.AddMonths(VaccinationDuration).CompareTo(DateTime.Now) > 0;
        }
        public override String ToString()
        {
            return String.Format("Breed: {1,-20} Name: {2,-10} Owner: {3,-10} ({4}) Last vaccination date: {5:yyyy-MM-dd}", Breed, Name, Owner, Phone, VaccinationDate);
        }
    }
}