【设计模式】题目小练1

// 题1. 网络游戏技能系统

// 某 RPG 游戏里，角色技能既有基础效果（如火球术、冰箭），又可以叠加各种修饰（如强化版、带毒、范围伤害）。

// 要求：

// 基础技能可独立存在。

// 可以在运行时动态地给技能添加修饰。

// 修饰的顺序会影响最终效果。

public abstract class ISkill
{
    public abstract void Execute();
}

// 基础效果
public class FireBall : ISkill
{
    public override void Execute()
    {   
        Console.WrileLine("装备火球");
    }
}

public class IceArrow : ISkill
{
    public override void Execute()
    {   
        if(skill != null)
            this.skill.Execute();
        Console.WrileLine("装备冰箭");
    }
}

public abstract class SkillDecorator : ISkill
{
    public ISkill innerSkill;

    public PowerUpDecorator(ISkill skill)
    {
        this.skill = innerSkill;
    }

    public override void Execute()
    {
        innerSkill.Execute();
    }
}

public class PowerUpDecorator : SkillDecorator
{   
    public PowerUpDecorator(ISkill skill):base(skill) { }

    public override void Execute()
    {   
        base.Execute();
        Console.WriteLine("能力提升");
    }
}

public abstract class PoisonDecorator : SkillDecorator
{
    public PoisonDecorator(ISkill skill) : base(skill) { }

    public override void Execute()
    {
        base.Execute();
        Console.WrileLine("附毒");
    }
}

public class AoEDecorator : SkillDecorator
{
    public AoEDecorator(ISkill skill) : base(skill) { }

    public override void Execute()
    {
        base.Execute();
        Console.WrileLine("造成范围伤害");
    } 
}

public class Client
{
    public static void Main()
    {
        ISkill fireBall = new FireBall();

        ISkill enhancedFireBall = new PowerUpDecorator(new PoisonDecorator(fireBall));
        enhancedFireBall.Execute();

        Console.WrileLine("_____________________________________");

        ISkill iceArrow = new IceArrow();
        ISkill aoeIceArrow = new AoEDecorator(new PowerUpDecorator(iceArrow));
        aoeIceArrow.Execute();
    }
}