last quiz solution

below is nearly a  suggested solution for the last quiz, there are a bit differences , but idea is identical

good luck for all

using System;

using System.Collections.Generic;

using System.Text;

using System.Collections;

namespace Hash_ArrayListPro

{

    class Program

    {

        public static Hashtable geo_info = new Hashtable(); 

        static void Main(string[] args)

        {

            for (int i = 0; i < 3; i++) 

            {

                Console.WriteLine("Enter country ");

                string country = Console.ReadLine();

                Console.WriteLine("Enter country area");

                object area = Console.ReadLine();

                geo_info.Add(country, area);

            } // end for

            Console.WriteLine("Geographic information are:");

            foreach (Object Key in geo_info.Keys)

            {

                Console.WriteLine(" {0} Area is :  {1}", Key, geo_info[Key]);

            }

            Console.WriteLine("enter the country name you want to modify its area");

            string key1 = Console.ReadLine();

            if (geo_info.Contains(key1))

            {

                geo_info[key1] = 111.1111;

                Console.WriteLine("Geographic information After Modification:");

                foreach (Object Key in geo_info.Keys)

                {

                    Console.WriteLine(" {0} Area is :  {1}", Key, geo_info[Key]);

                }

            }

            else

            {

                Console.WriteLine("Not exists Country");

            }

            

            

            ArrayList list = new ArrayList();

            list.Add("ali");

            list.Add(88);

            list.Add('B');

            foreach (object x in list)

                Console.WriteLine(x);

            Console.WriteLine(list.Count);

            Console.ReadLine();

            list.Insert(1,"hasan");

            list.Reverse();

            foreach (object x in list)

                Console.WriteLine(x);

  

        }// end main

    }

}

quize 4 suggested solution

using System;

using System.Collections.Generic;

using System.Text;

namespace quize4

{

    class MobilePhone

    {

        int cost;

        int serial;

        protected string color;

        public MobilePhone()

        {

        Console.WriteLine("default values is cost =0, serial=0 and color=non");

            cost = 0;

            serial = 0;

            color = "non";

        }

        public MobilePhone(int c, int s, string co)

        {

            cost = c;

            serial = s;

            color = co;

             Console.WriteLine("general mobile object created");

             Console.WriteLine("{0},{1},{2}",cost,serial,color);

        }

        public int Cost

        {

        set {cost=value;}

        get{return cost;}

         }

       public int Serial{

        set { serial = value; }

        get { return serial; }

   

    }

        public void ComputePrice(double tax)

        {

            Console.WriteLine("total price in piaster is :");

            Console.WriteLine(tax + cost);

           

        }

    }

    class NokiPhone:MobilePhone

    {

        string model;

      

        public NokiPhone(  int c, int s,string co, string m):base(c,s,co)

        {

            model = m;

           Console.WriteLine(model);

        }

        public new void ComputePrice(double tax)

        {

            Console.WriteLine("total price in JD is :");

         

            Console.WriteLine(tax + Cost/100);

          

        }

   

    }

    class  SonyPhone: MobilePhone

    {

        public SonyPhone()

        {

            color = "blue";

            Console.WriteLine("\nthe sony color is {0} \n",color);

         }

   

    }

    class Program

    {

        static void Main(string[] args)

        {

            MobilePhone m = new MobilePhone(20,11,"red");

            m.ComputePrice(0.4);

            NokiPhone n = new NokiPhone(20, 22, "yellow","6300");

           

            n.ComputePrice(0.4);

       

         

            SonyPhone s = new SonyPhone();

        }

    }

}