第三周作业一

手写单例代码如下：



2.组合模式打印

效果图如下：



C#代码如下：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;



namespace WindowsFormsApp2

{

public abstract class Component

{

protected string name;

public Component(string name)

{

this.name = name;

}



public abstract string Display();



}



public class Leaf : Component

{

public Leaf(string name) : base(name) { }



public override string Display()

{

return name;

}

}



public class Composite:Component

{

public Composite(string name) : base(name) { }



private List<Component> children = new List<Component>();



public void add(Component component)

{

children.Add(component);

}

public override string Display()

{

string displayString = name + "\n";

foreach (Component component in children)

{

displayString = displayString + component.Display()+"\n";

}



return displayString;

}

}

}



--------------------------------------------------------------------------------------------

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;



namespace WindowsFormsApp2

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}



private void Form1_Load(object sender, EventArgs e)

{

// 生成树根，并为其增加两个叶子节点

Composite root = new Composite(this.Name+"("+ this.Text+")");

root.add(new Leaf(pictureBox1.Name+("(Logo图片)")));

root.add(new Leaf(button1.Name+("(登录)")));

root.add(new Leaf(button2.Name + ("(注册)")));



// 为根增加两个枝节点

Composite branchX = new Composite(panel1.Name+ "(Frame1)");

root.add(branchX);



// 为BranchX增加页节点

branchX.add(new Leaf(label1.Name+ "(用户名)"));

branchX.add(new Leaf(textBox1.Name + "(文本框)"));

branchX.add(new Leaf(label2.Name + "(密码)"));

branchX.add(new Leaf(textBox2.Name + "(密码框)"));

branchX.add(new Leaf(checkBox1.Name + "(复选框)"));

branchX.add(new Leaf(label3.Name + "(记住用户名)"));

branchX.add(new Leaf(linkLabel1.Name + "(忘记密码)"));



// 显示树

string sss = root.Display();



MessageBox.Show(sss);

}

}

}