Question

Ive got this started but im really struggling its a c# program, I have to modify the class  Purse  to implement the interface ICloneable . create a main program that demonstrates that the Purse method Clone works.

using System;
using System.Collections;

namespace TestingProject
{
   /// <summary>
   /// A coin with a monetary value.
   /// </summary>
   public class Coin   {

       ///   Constructs a coin.
       ///   @param aValue the monetary value of the coin
       ///   @param aName the name of the coin
       public Coin(double aValue, String aName)
       {
           value = aValue;
           name = aName;
       }

       /// Gets the coin value.
       /// @return the value
       public double GetValue()   
       {
           return value;
       }

       ///   Gets the coin name.
       /// @return the name
       public String GetName()
       {
           return name;
       }
      
       public override bool Equals(Object otherObject)
       {
           Coin other = (Coin)otherObject;
           return name==other.name
               && value == other.value;
       }

       // C# requirement:
       // since we override Equals, MUST also override GetHashCode ( !! )
       public override int GetHashCode()
       {
           return base.GetHashCode ();
       }

      

       private double value;
       private string name;
   }
}

using System;
using System.Collections;

namespace TestingProject
{
   /// <summary>
   /// A purse holds a collection of coins.
   /// </summary>
   public class Purse : ICloneable
   {
       /// Constructs an empty purse.
       public Purse()
       {
           coins = new ArrayList();
           Purse MyPurse = (Purse)MemberwiseClone();
       }

       /// Add a coin to the purse.
       /// @param aCoin the coin to add
       public void Add(Coin aCoin)
       {
           coins.Add(aCoin);
       }

       /// Get the total value of the coins in the purse.
       /// @return the sum of all coin values
       public double GetTotal()
       {
          
           double total = 0;
           for (int i = 0; i < coins.Count; i++)
           {
               Coin aCoin = (Coin)coins[i];
               total = total + aCoin.GetValue();
           }
           return total;
       }

       public Object Clone()
       {
           return MemberwiseClone();
       }
      

       private ArrayList coins;
   }

}

Answer 1

TestingProject. Purse pursel = new TestingProject. Purse(); purse1.Add(new Testing Project.Coin(1, "penny")); purse1.Add(new TestingProject.Coin(5, "nickel")); purse1.Add(new Testing Project.Coin(10, "dime")); mcs -out:ma mono main.e 16 16 9 Console.WriteLine(purse1. GetTotal()); 41 16 1 2 3 4 5 // Get purse2 by cloning TestingProject. Purse purse2 = purse1.clone () as Testing Project. Purse; Console.WriteLine(purse2. GetTotal()); 6 8 // Now add something on pursel, which should not change purse 2. purse1.Add(new Testing Project.Coin(25, "quarter")); 1 2 Console.WriteLine(); Console.WriteLine(pursel. GetTotal()); Console.WriteLine(purse2.GetTotal()); 3 4 5

using System;
using System.Collections;

namespace TestingProject
{
   /// <summary>
   /// A coin with a monetary value.
   /// </summary>
   public class Coin {

       ///   Constructs a coin.
       ///   @param aValue the monetary value of the coin
       ///   @param aName the name of the coin
       public Coin(double aValue, String aName)
       {
           value = aValue;
           name = aName;
       }

       /// Gets the coin value.
       /// @return the value
       public double GetValue()   
       {
           return value;
       }

       ///   Gets the coin name.
       /// @return the name
       public String GetName()
       {
           return name;
       }
      
       public override bool Equals(Object otherObject)
       {
           Coin other = (Coin)otherObject;
           return name==other.name
               && value == other.value;
       }

       // C# requirement:
       // since we override Equals, MUST also override GetHashCode ( !! )
       public override int GetHashCode()
       {
           return base.GetHashCode ();
       }

       private double value;
       private string name;
   }

   /// <summary>
   /// A purse holds a collection of coins.
   /// </summary>
   public class Purse : ICloneable
   {
       /// Constructs an empty purse.
       public Purse()
       {
           coins = new ArrayList();
       }

       /// Add a coin to the purse.
       /// @param aCoin the coin to add
       public void Add(Coin aCoin)
       {
           coins.Add(aCoin);
       }

       /// Get the total value of the coins in the purse.
       /// @return the sum of all coin values
       public double GetTotal()
       {
           double total = 0;
           for (int i = 0; i < coins.Count; i++)
           {
               Coin aCoin = (Coin)coins[i];
               total = total + aCoin.GetValue();
           }
           return total;
       }

       public Object Clone()
       {
           Purse p = new Purse();
           p.coins = (ArrayList)coins.Clone();
           return p;
       }

       private ArrayList coins;
   }

}

class MainClass {
  public static void Main (string[] args) {
    TestingProject.Purse purse1 = new TestingProject.Purse();
    purse1.Add(new TestingProject.Coin(1, "penny"));
    purse1.Add(new TestingProject.Coin(5, "nickel"));
    purse1.Add(new TestingProject.Coin(10, "dime"));

    Console.WriteLine(purse1.GetTotal());

    // Get purse2 by cloning
    TestingProject.Purse purse2 = purse1.Clone() as TestingProject.Purse;
    Console.WriteLine(purse2.GetTotal());

    // Now add something on purse1, which should not change purse 2.
    purse1.Add(new TestingProject.Coin(25, "quarter"));
    
    Console.WriteLine();
    Console.WriteLine(purse1.GetTotal());
    Console.WriteLine(purse2.GetTotal());
  }
}

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