program.cs

来自「这是asp.net^和Visual C++Sharp编写的串并口通讯的书籍 源代」· CS 代码 · 共 68 行

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

namespace _2
{
    abstract class AComponent
    {
        protected string name;
        public AComponent(string name)
        {
            this.name = name;
        }
        public abstract void Display(int deep);
    }
    // 合成
    class Composite : AComponent
    {
        private ArrayList children = new ArrayList();
        public Composite(string name) : base(name) { }
        public void Add(AComponent c)
        {
            children.Add(c);
        }
        public void Remove(AComponent c)
        {
            children.Remove(c);
        }
        public override void Display(int deep)
        {
            Console.WriteLine(new String('*', deep) + name);
            // 输出每一个子节点。
            foreach (AComponent c in children)
                c.Display(deep + 2);
        }
    }
    // 子项
    class Leaf : AComponent
    {
        public Leaf(string name) : base(name) { }
        public override void Display(int deep)
        {
            Console.WriteLine(new String('-', deep) + name);
        }
    }
    public class Client
    {
        public static void Main(string[] args)
        {
            // Create a tree structure
            Composite root = new Composite("根目录");
            root.Add(new Leaf("子项 A"));
            root.Add(new Leaf("子项 B"));
            Composite comp = new Composite("合成 X");
            comp.Add(new Leaf("子项 XA"));
            comp.Add(new Leaf("子项 XB"));
            root.Add(comp);
            root.Add(new Leaf("子项 C"));
            //添加和移除子项
            Leaf l = new Leaf("子项 D");
            root.Add(l);
            root.Remove(l);
            root.Display(1);
        }
    }
}