// IAttackAction.cs

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

namespace interface_demo
{
    interface IAttackAction
    {
        void attack();
    }
}


// ===============================================


// Archer.cs

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

namespace interface_demo
{
    class Archer: IAttackAction
    {
        public void attack()
        {
            Console.Out.WriteLine("Archer: shoots arrows.");
        }
    }
}


// =========================================

// Rifleman.cs

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

namespace interface_demo
{
    class Rifleman: IAttackAction
    {
        public void attack()
        {
            Console.Out.WriteLine("Rifleman: starts shooting.");
        }
    }
}


// ==================================

// Swordsman.cs

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

namespace interface_demo
{
    class Swordsman: IAttackAction
    {
        public void attack()
        {
            Console.Out.WriteLine("Swordsman: swings battlesword.");
        }
    }
}


// ================================


// Main.cs


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

namespace interface_demo
{
    class Program
    {
        public static void Controller(IAttackAction Unit)
        {
            Unit.attack();
        }

        static void Main(string[] args)
        {
            Controller(new Archer());
            Controller(new Swordsman());
            Controller(new Rifleman());
            Console.Out.WriteLine("Press any key to quit...");
            Console.ReadKey(false);
        }
    }
}