programming-examples/c-sharp/Inheritance_&_Interface/C# Program to Display Cost of a Rectangle Plot Using Inheritance.cs

/*
 *  C# Program to Display Cost of a Rectangle Plot Using Inheritance
 */
using System;
class Rectangle
{
    protected double length;
    protected double width;
    public Rectangle(double l, double w)
    {
        length = l;
        width = w;
    }
    public double GetArea()
    {
        return length * width;
    }
    public void Display()
    {
        Console.WriteLine("Length: {0}", length);
        Console.WriteLine("Width: {0}", width);
        Console.WriteLine("Area: {0}", GetArea());
    }
}
class Tabletop : Rectangle
{
    private double cost;
    public Tabletop(double l, double w)
        : base(l, w)
    { }
    public double costcal()
    {
        double cost;
        cost = GetArea() * 70;
        return cost;
    }
    public void Display()
    {
        base.Display();
        Console.WriteLine("Cost: {0}", costcal());
    }
}
class CalRectangle
{
    static void Main(string[] args)
    {
        Tabletop t = new Tabletop(7.5, 8.03);
        t.Display();
        Console.ReadLine();
    }
}

/*
Length: 7.5
Width: 8.03
Area: 60.225
Cost: 4215.75