Exercise
Table + coffetable + leg
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.
Example 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();
}
}
}