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using System;
namespace dirtysalt
{
 public class Car//class of car,has attribute of 'weight' and 'speed'
 {
  private int weight;
  private int speed;
  public Car(int Weight,int Speed)
  {
   weight=Weight;
   speed=Speed;
  }
  public void setweight(int Weight)
  {
   weight=Weight;
  }
  public void setspeed(int Speed)
  {
   speed=Speed;
  }
  public int getspeed()
  {
   return speed;
  }
  public int getweight()
  {
   return weight;
  }
 };

 public class Sportcar:Car//inherit class of Car,has  attributes of 'weight','speed','color'
 {
  private string color;
  public  Sportcar(int Weight,int Speed,string Color):base(Weight,Speed)
  {
   setweight(Weight);
   setspeed(Speed);
   color=Color;
  }
  public void setcolor(string Color)
  {
   color=Color;
  }
  public string getcolor()
  {
   return color;
  }
  public static void Main()
  {
   Car car=new Car(100,100);
   Sportcar sportcar=new Sportcar(100,200,"blcak");//here has a problem
   Console.WriteLine("car's weight is "+car.getweight());
   Console.WriteLine("car's speed is "+car.getspeed());
   Console.WriteLine("sportcar's weight is "+sportcar.getweight());
   Console.WriteLine("sportcar's speed is "+sportcar.getspeed());
   Console.WriteLine("sportcar's speed is "+sportcar.getcolor());
  }
 }
}