Notes

//2

public class Shape
{
public int x;
public Shape() { }

public virtual double Area()
{ return x; }
}

public class Rectangle : Shape
{
public int len;
public int breadth;
public Rectangle(int len,int breadth)
{
this.len = len;
this.breadth = breadth;
}

public override double Area()
{
return len * breadth;
}
}

public class Circle : Shape
{
public int radius;
public Circle(int radius)
{
this.radius = radius;
}

public override double Area()
{
return 3.14 * radius * radius;
}
}

public class ShapeArea
{
public static void Main()
{
Rectangle rect = new Rectangle(10, 34);
double result = rect.Area();
Console.WriteLine("Area of Rectangle is : "+result);

Circle circle = new Circle(10);
double res = circle.Area();
Console.WriteLine("Area of Circle is : " + res);
}

}