Table + coffetable + leg Learn programming C# Sharp

Lesson:

More On Classes


Exercise:

Table + coffetable + leg 12


Objetive:

Extend the example of the tables and the coffee tables, to add a class "Leg" with a method "ShowData", which will write "I am a leg" and then it will display the data of the table to which it belongs.

Choose one table in the example, add a leg to it and ask that leg to display its data.


Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Tables
{
    class CoffeeTable : Table
    {
        public CoffeeTable(int tableWidth, int tableHeight)
            : base(tableWidth, tableHeight)
        {
        }

        public override void ShowData()
        {
            Console.WriteLine("Width: {0}, Height: {1}", width, height);
            Console.WriteLine("(Coffee table)");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Tables
{
    class Leg
    {
        Table myTable;

        public Leg()
        {

        }

        public void SetTable(Table t)
        {
            myTable = t;
        }

        public void ShowData()
        {
            Console.WriteLine("I am a leg");
            myTable.ShowData();
        }
    }
}

using System;
namespace Tables
{
    class Table
    {
        protected int width, height;
        protected Leg myLeg;

        public Table(int tableWidth, int tableHeight)
        {
            width = tableWidth;
            height = tableHeight;
        }

        public void AddLeg(Leg l)
        {
            myLeg = l;
            myLeg.SetTable(this);
        }

        public virtual void ShowData()
        {
            Console.WriteLine("Width: {0}, Height: {1}", width, height);
        }
    }
}

using System;
namespace Tables
{
    class TestTable
    {
        static void Main(string[] args)
        {
            // Using as a single table:

            Table t = new Table(80, 120);
            Leg l = new Leg();
            t.AddLeg(l);
            l.ShowData();

            Console.WriteLine();

            // Using as array:

            Table[] tableList = new Table[10];
            Random random = new Random();

            for (int i = 0; i < tableList.Length; i++)
            {
                if (i < tableList.Length / 2)
                    tableList[i] = new Table(
                        random.Next(50, 201),
                        random.Next(50, 201));
                else
                    tableList[i] = new CoffeeTable(
                        random.Next(40, 121),
                        random.Next(40, 121));
            }

            for (int i = 0; i < tableList.Length; i++)
            {
                tableList[i].ShowData();
            }

            // TODO: To be removed
            Console.ReadLine();
        }
    }
}