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:



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



发布于: 2020 年 06 月 24 日 阅读数: 37
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架构师训练营第三周命题作业