Create an abstract class called shape Shape will have an abstract property calle

Question

Create an abstract class called shape

Shape will have an abstract property called area

Shape will have a static backing field called _count

Shape will have a readonly property that will return the number of shapes created (the _count)

Shape will have a constructor that will increment the count field

Create a concrete class called rectangle

Rectangle will implement shape

Will have 2 fields to hold the width and height

Will have a constructor that will take in a width and height and will assign them to the fields

Rectangle will implement area and will return the width x height

Create a concrete class called circle

Implements shape

One field: diameter

Constructor takes in and set the diameter

Returns area ( 3.14 * (½ * diameter)* (½ * diameter)

Write code that

will create 3 rectangles and return their area

output the number of shapes created

will create 2 circles and return the area

output the number of shapes created

I need answet in C# visual studio windows form application. Need picture of designer too.

Please answer ASAP

thanks

Explanation / Answer

w4.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;

namespace W4___MDORFMAN
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnEx_Click(object sender, EventArgs e)
        {
            // Creating 3 Rectangle Objects with Fixed Width & Height
            rectangle r1 = new rectangle(10, 10);
            rectangle r2 = new rectangle(20, 90);
            rectangle r3 = new rectangle(160, 300);

            // Outputing Area and How many Rectangles were Created
            Console.WriteLine("Rectangle Area: " + r1.area());
            Console.WriteLine("Rectangle Area: " + r2.area());
            Console.WriteLine("Rectangle Area: " + r3.area());
            Console.WriteLine("Rectangle Objects Created: " + r1.count);

            // Creating 2 Circle Objects with Fixed Diameters
            circle s1 = new circle(160);
            circle s2 = new circle(250);

            // Outputing Area and How many Circles were Created
            Console.WriteLine("Circle Area: " + s1.area());
            Console.WriteLine("Circle Area: " + s2.area());
            Console.WriteLine("Cirle Objects Created: " + s1.count);
        }
    }

    // Abstract Shape Class
    abstract class shape
    {
        // Abstract Property
        public abstract double area();

        // Static Backing Field
        static double _count;

        // Readonly Property
        // Returns _count (# of Shapes)
        public double count
        {
            get
            {
                return _count;
            }
        }

        // Constructor
        // Increments Count
        public shape()
        {
            _count++;
        }

    }

    // Rectangle Class (Inherits from Shape)
    class rectangle : shape
    {
        // 2 Fields
        private double width;
        private double height;

        //Constructor rectangle
        // recieves 2 int's assigns them to fields
        public rectangle(double w, double h)
        {
            width = w;
            height = h;
        }

        // Implements the area method area from shape class
        // returns width * height
        public override double area()
        {
            return (width * height);
        }
    }

    // Circle Class (Inherits from Shape Class)
    class circle : shape
    {
        // Fields
        private double diameter;

        // Constructor
        // Recieves a double and sets the diameter
        public circle (double d)
        {
            diameter = d;
        }

        // Implemtation of the Area Method from the
        // Abstract Shape Class returns the area
        public override double area()
        {
            return ((3.14 * ( 0.5 * diameter) * (0.5 * diameter)));
        }

    }

}

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