using System;   

public class Program

{

    public static void Main()

    {

            int a = 7;

            int b = 7;

            Evaluator evaluator = new Evaluator();

        evaluator.AddAction(new Action1());

        a = evaluator.ExecuteAction(a,b);

        evaluator.AddAction(new Action2());

        b = evaluator.ExecuteAction(a,b);

        Console.WriteLine(a);

        Console.WriteLine(b);

    }

}

public interface IAction

{

public int Algorythm(int a, int b);

}

public class Action1 : IAction

{

​

public int Algorythm(int a, int b)

{

if (a > b)

{

return a * (b + 2);

}

else if (a < b)

{

return b * (a + 1);

}

else

{

return b * (a + 2);

}

}

}

public class Action2 : IAction

{

public int Algorythm(int a, int b)

{

if (a > b)

{

return a - b;

}

else if (a < b)

{

return b - a;

}

else

{

return 2 * (a + b);

}

}

}

public class Evaluator

{

public IAction Action{get;set;} 

public int ExecuteAction(int a,int b)

{

return Action.Algorythm(a, b);

}

public void AddAction(IAction Action)

{

this. Action = Action;

}

}

​

​

​