321, C# - rextester

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

namespace Rextester
{
    abstract public class Duck
    {
        public FlyBehavior flyBehavior;
        public QuackBehavior quackBehavior;
        public void setFlyBehavior(FlyBehavior fb)
        {
            flyBehavior = fb;
        }

public void setQuackBehavior(QuackBehavior qb)
        {
            quackBehavior = qb;
        }

public void performQuack()
        {
            quackBehavior.quack();
        }

public void performFly()
        {
            flyBehavior.fly();
        }

public void swimme()
        {
            Console.WriteLine("Я плаваю");
        }

public abstract void display();
    }

public interface FlyBehavior
    {
        void fly();
    }

public interface QuackBehavior
    {
        void quack();
    }

public class Quack : QuackBehavior
    {
        public void quack()
        {
            Console.WriteLine("Крякаю");
        }
    }

public class Squeak : QuackBehavior
    {
        public void quack()
        {
            Console.WriteLine("Пищу");
        }
    }

public class MuteQuack : QuackBehavior
    {
        public void quack()
        {
            Console.WriteLine("Не разговариваю");
        }
    }

public class FlyWithWings : FlyBehavior
    {
        public void fly()
        {
            Console.WriteLine("Летаю на крыльях");
        }
    }

public class FlyNoWay : FlyBehavior
    {
        public void fly()
        {
            Console.WriteLine("Не умею летать");
        }
    }

public class DecoyDuck : Duck
    {
        public DecoyDuck()
        {
            quackBehavior = new MuteQuack();
            flyBehavior = new FlyNoWay();
        }

public override void display()
        {
            Console.WriteLine("Приманка");
        }
    }
    public class RubberDuck : Duck
    {
        public RubberDuck()
        {
            quackBehavior = new Squeak();
            flyBehavior = new FlyNoWay();
        }

public override void display()
        {
            Console.WriteLine("Резиновая утка");
        }
    }
    public class RedheadDuck : Duck
    {
        public RedheadDuck()
        {
            quackBehavior = new Quack();
            flyBehavior = new FlyWithWings();
        }

public override void display()
        {
            Console.WriteLine("Нырок красноголовый");
        }
    }
    public class MallardDuck : Duck
    {
        public MallardDuck()
        {
            quackBehavior = new Quack();
            flyBehavior = new FlyWithWings();
        }

public override void display()
        {
            Console.WriteLine("Кряква");
        }
    }

public class Program
    {
        public static void Main(string[] args)
        {
            Duck DecoyDuck = new DecoyDuck();
            DecoyDuck.performQuack();
            DecoyDuck.performFly();
            DecoyDuck.swimme();
            
            Duck RubberDuck = new RubberDuck();
            RubberDuck.performQuack();
            RubberDuck.performFly();
            RubberDuck.swimme();
            
            Duck RedheadDuck = new RedheadDuck();
            RedheadDuck.performQuack();
            RedheadDuck.performFly();
            RedheadDuck.swimme();
            
            Duck mallardDuck = new MallardDuck();
            mallardDuck.performQuack();
            mallardDuck.performFly();
            mallardDuck.swimme();

DecoyDuck.setQuackBehavior(new Squeak());
            RubberDuck.setFlyBehavior(new FlyWithWings());

DecoyDuck.performQuack();
            RubberDuck.performFly();
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,28 sec, absolute running time: 0,11 sec, cpu time: 0,09 sec, average memory usage: 15 Mb, average nr of threads: 3, absolute service time: 0,43 sec