RPG设计(物品锻造与Decorator模式)

public abstract class Weapon{
    public virturl int Damage(){
       int total = 0;
       if(redDiamond!=null)
           total += redDiamond.Damage();       //附加红宝石的伤害
       if(blueDiamond!=null)
           total += blueDiamond.Damage();      //附加蓝宝石的伤害
       if(greenDiamond!=null)
           total += greenDiamond.Damage();     //附加绿宝石的伤害
       return total;
    }
}

public class Sword: Weapon{
    public override ind Damage(){
       return base.Damage() + 15; // 15 是剑本身伤害
    }
}

Weapon sword = new Sword();             // 创建一把剑
sword = new RedDiamond(sword);          // 给剑添加 红宝石
sword = new BlueDiamond(sword);         // 给剑添加 蓝宝石

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

namespace Decorator {

    // 定义Weapon基类
    public abstract class Weapon {

       protected string description;           // 武器的描述(攻击效果)

       public virtual string GetDescription() {
           return description;
       }

       public abstract int Damage();           // 武器的伤害
    }

    // 定义剑
    public class Sword : Weapon {
       public Sword() {
           description = "One-Hand light Sword";
       }
       public override int Damage() {
           return 15;
       }
    }

    // 定义宝石基类
    public abstract class Diamond : Weapon {
       protected Weapon weapon;        // 保存对武器的引用
    }

    // 定义蓝宝石
    public class BlueDiamond : Diamond {
       private int iceDamage = 2;          // 蓝宝石的额外伤害

       public BlueDiamond(Weapon weapon) {
           this.weapon = weapon;        // 保存引用
       }

       public string IceEffect(){
           return "\nAddtional Effect: Frozen !";
       }

       public override int Damage() {
           return weapon.Damage() + iceDamage; // 攻击加成
       }

       public override string GetDescription() {
           return weapon.GetDescription() + IceEffect();  // 加入特殊攻击效果
       }
    }
    
    // 定义红宝石
    public class RedDiamond : Diamond {
       private int fireDamage = 3;         // 蓝宝石的额外伤害

       public RedDiamond(Weapon weapon) {
           this.weapon = weapon;        // 保存引用
       }

       public string FireEffect() {
           return "\nAddtional Effect: Fire !";
       }

       public override int Damage() {
           return weapon.Damage() + fireDamage;    // 攻击加成
       }

       public override string GetDescription() {
           return weapon.GetDescription() + FireEffect(); // 加入特殊攻击效果
       }
    }

    class Program {
       static void Main(string[] args) {
           Weapon sword = new Sword();     // 创建一把新剑
           // 打印其描述(攻击效果) 和 伤害
           Console.WriteLine(sword.GetDescription() + "\nDamage:" + sword.Damage());
           Console.WriteLine();

           sword = new BlueDiamond(sword); // 给剑添加一颗蓝宝石
           Console.WriteLine(sword.GetDescription() + "\nDamage:" + word.Damage());
           Console.WriteLine();

           sword = new RedDiamond(sword);  // 给剑添加一颗红宝石
           Console.WriteLine(sword.GetDescription() + "\nDamage:" + sword.Damage());
           Console.WriteLine();
       }
    }
}

One-Hand light Sword
Damage:15

One-Hand light Sword
Addtional Effect: Frozen !
Damage:17

One-Hand light Sword
Addtional Effect: Frozen !
Addtional Effect: Fire !
Damage:20