Answer to Question #260723 in C# for Phamela

Question

this is prac 3:

Task You need to implement a program for a car salesman who wants to keep record of the cars he has for sale. For each car he keeps the following: Registration Number (always unique), Model,Colour and Price Implement the following classes Class Car It must have a constructor, the necessary Get and Set methods, as well as the following methods:public boolean isCheap()// returns TRUE if the car is selling for under R10000.00 public void decreasePrice(double Amount)// decreases the selling price by Amount public void Display()// displays the Registration Number and Price of a car Class CarList It must contain the standard methods you would expect in a list class. The class must be able to interact with a data file (in other words, get initial data from a data file, and write the final data to a data file), and uses ArrayLists to implement a list Application Class The application class must have methods that do the following

Answer 1

using System;
using System.Collections.Generic;


namespace App
{
    class Car
    {
        private int registrationNumber;


        public int RegistrationNumber
        {
            get { return registrationNumber; }
            set { registrationNumber = value; }
        }
        private string model;


        public string Model
        {
            get { return model; }
            set { model = value; }
        }
        private string colour;


        public string Colour
        {
            get { return colour; }
            set { colour = value; }
        }
        private double price;


        public double Price
        {
            get { return price; }
            set { price = value; }
        }
        public Car(int registrationNumber, string model, string colour, double price)
        {
            this.registrationNumber = registrationNumber;
            this.model = model;
            this.colour = colour;
            this.price = price;
        }
        /// <summary>
        ///  Cars should be classified as cheap if the selling price is < R10000.00
        /// </summary>
        /// <returns></returns>
        public bool isCheap()
        {
            if (this.price < 10000.00)
            {
                return true;
            }
            return false;
        }
        public void decreasePrice(double Amount) {
            this.price -= Amount;
        }
        public void Display()
        {
            Console.WriteLine("Registration number: " + registrationNumber.ToString() + Environment.NewLine +
                "Model: " + model + Environment.NewLine +
                "Colour: " + colour + Environment.NewLine +
                "Price: R" + price.ToString() + Environment.NewLine);
        }
    }




    class CarList
    {


        private List<Car> cars = new List<Car>();


        public CarList()
        {


        }




        public void displayCheapestCars() {
            Console.WriteLine("The details of the cheapest cars: ");
            for (int i = 0; i < cars.Count; i++)
            {
                if (cars[i].isCheap()) {
                    cars[i].Display();
                }
                
            }
        }


        public void addCar(Car car)
        {
            this.cars.Add(car);
        }


        public void display()
        {
            for (int i = 0; i < cars.Count; i++)
            {
                cars[i].Display();
            }
        }
        public void decreasePrice(double Amount)
        {
         for (int i = 0; i < cars.Count; i++)
            {
                cars[i].decreasePrice(Amount);
            }
        }


      
    }


    class Program
    {




        static void Main(string[] args)
        {
            CarList carList = new CarList();
            carList.addCar(new Car(5646321, "Ford X5", "Red", 45000));
            carList.addCar(new Car(7894546, "Ford X8", "Blue", 5000));
            carList.addCar(new Car(8745565, "Reno X45", "Yellow", 95050));
            carList.addCar(new Car(4575457, "Ford X2", "Green", 9000));
            carList.addCar(new Car(2454477, "Ford S2", "Black", 25000));
            carList.display();
            carList.displayCheapestCars();
            Console.WriteLine("decrease price 2000");
            carList.decreasePrice(2000);
            carList.display();




            Console.ReadLine();
        }




    }
}