架构师训练营第三周命题作业

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发布于: 2020 年 06 月 24 日
1 作业一请在草稿纸上手写一个单例模式的实现代码，拍照提交作业。
C++单例模式实现如下：
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2 作业二
请用组合设计模式编写程序，打印输出图 1 的窗口，窗口组件的树结构如图 2 所示，打印输出示例参考图 3。
为实现题目要求，设计了三个接口Component、Leaf、Composite。其他类实现Leaf或Composite接口，类图如下（其中Leaf的实现类较多，下图以Button和Label类为例）：
完整代码如下：
#include <iostream>
#include <string>
#include <vector>
// interface Component
class Component
{
public:
    virtual void Operation() = 0;
};
// interface Leaf
class Leaf : public Component
{};
// interface Composite
class Composite : public Component
{
public:
    virtual std::vector<Component*>& GetChildren() = 0;
    virtual void Add(_In_ Component*) = 0;
};
class WinForm : public Composite
{
public:
    WinForm(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "WinForm: " << m_name << std::endl;
        for (const auto& component : m_children)
        {
            component->Operation();
        }
    }
    virtual std::vector<Component*>& GetChildren() override
    {
        return m_children;
    }
    virtual void Add(_In_ Component* child) override
    {
        m_children.emplace_back(child);
    }
private:
    std::string m_name;
    std::vector<Component*> m_children;
};
class Frame : public Composite
{
public:
    Frame(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "Frame: " << m_name << std::endl;
        for (const auto& component : m_children)
        {
            component->Operation();
        }
    }
    virtual std::vector<Component*>& GetChildren() override
    {
        return m_children;
    }
    virtual void Add(_In_ Component* child) override
    {
        m_children.emplace_back(child);
    }
private:
    std::string m_name;
    std::vector<Component*> m_children;
};
class Picture : public Leaf
{
public:
    Picture(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "Picture: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class Button : public Leaf
{
public:
    Button(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "Button: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class Label : public Leaf
{
public:
    Label(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "Label: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class TextBox : public Leaf
{
public:
    TextBox(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "TextBox: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class PasswordBox : public Leaf
{
public:
    PasswordBox(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "PasswordBox: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class CheckBox : public Leaf
{
public:
    CheckBox(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "CheckBox: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
class LinkLabel : public Leaf
{
public:
    LinkLabel(const std::string& name) : m_name(name) {}
    virtual void Operation() override
    {
        std::cout << "LinkLabel: " << m_name << std::endl;
    }
private:
    std::string m_name;
};
int main()
{
    WinForm winForm {"WinForm"};
    winForm.Add(new Picture {"Logo"});
    Frame frame {"Frame"};
    frame.Add(new Label {"Username"});
    frame.Add(new TextBox {"Username text box"});
    frame.Add(new Label {"Password"});
    frame.Add(new PasswordBox {"Password box"});
    frame.Add(new CheckBox {"Remember me check box"});
    frame.Add(new Label {"Remember me"});
    frame.Add(new LinkLabel {"Forget passowrd"});
    winForm.Add(&frame);
    winForm.Add(new Button {"Login"});
    winForm.Add(new Button {"Register"});
    winForm.Operation();
    return 0;
}
代码结果如下：
WinForm: WinForm
Picture: Logo
Frame: Frame
Lable: Username
TextBox: Username text box
Lable: Password
PasswordBox: Password box
CheckBox: Remember me check box
Lable: Remember me
LinkLable: Forget passowrd
Button: Login
Button: Register
﻿