设计模式(4)---装饰模式

 1 // Decorator.cpp : 定义控制台应用程序的入口点。
 2 //
 3 
 4 #include "stdafx.h"
 5 #include <memory>
 6 #include <string>
 7 #include <iostream>
 8 using namespace std;
 9 
10 class Person
11 {
12 public:
13     Person(string name = ""): name_(name)
14     {}
15     virtual void Show()
16     {
17         cout << "My name is :" << name_ << endl;
18     }
19 protected:
20     string name_;
21 };
22 
23 class Finery : public Person
24 {
25 public:
26     void Decorator(shared_ptr<Person> person)
27     {
28         person_ = person;
29     }
30     virtual void Show()
31     {
32         if (nullptr != person_)
33         {
34             person_->Show();
35         }
36     }
37 protected:
38     shared_ptr<Person> person_;
39 };
40 
41 class TShirt :public Finery
42 {
43 public:
44     virtual void Show()
45     {
46         cout << "This is TShirt." << endl;
47         person_->Show();
48     }
49 };
50 
51 class Sneaker : public Finery
52 {
53 public:
54     virtual void Show()
55     {
56         cout << "This is Sneaker." << endl;
57         person_->Show();
58     }
59 };
60 
61 int main()
62 {
63     auto person  = make_shared<Person>("cauchy");
64     auto tshirt  = make_shared<TShirt>();
65     auto sneaker = make_shared<Sneaker>();
66     tshirt->Decorator(person);
67     tshirt->Show();
68     sneaker->Decorator(tshirt);
69     sneaker->Show();
70 
71     return 0;
72 }