using System;
 
namespace VehicleHierarchy
{
    // Базовый класс транспортного средства
    class Vehicle
    {
        public string Brand { get; set; }
        public int Speed { get; set; }
 
        public virtual void ShowInfo()
        {
            Console.WriteLine($"Марка: {Brand}, Скорость: {Speed} км/ч");
        }
 
        public virtual void Start()
        {
            Console.WriteLine($"{Brand} начал движение.");
        }
    }
 
    // Класс грузовика
    class Truck : Vehicle
    {
        public double CargoCapacity { get; set; } // Новая характеристика - грузоподъемность
 
        public override void ShowInfo()
        {
            base.ShowInfo();
            Console.WriteLine($"Грузоподъемность: {CargoCapacity} тонн");
        }
    }
 
    class Program
    {
        static void Main()
        {
            Truck myTruck = new Truck { Brand = "Volvo", Speed = 90, CargoCapacity = 15 };
            myTruck.ShowInfo();
        }
    }
}

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