设计模式15——外观模式

外观模式中提供一个统一的接口，然后对外观操作，内部成员可以不相同。

 1 #ifndef Facade_H_H
 2 #define Facade_H_H
 3
 4 class A{
 5 public:
 6     void showA(){
 7         cout << "This is class A" << endl;
 8     }
 9 };
10
11 class B{
12 public:
13     void showB(){
14         cout << "This is class B" << endl;
15     }
16 };
17
18 class C{
19 public:
20     void showC(){
21         cout << "This is class C" << endl;
22     }
23 };
24
25 class Facade{
26 public:
27     Facade(){
28         pA = new A();
29         pB = new B();
30         pC = new C();
31     }
32
33     void show(){
34         pA->showA();
35         pB->showB();
36         pC->showC();
37     }
38
39     ~Facade(){
40         delete pA;
41         delete pB;
42         delete pC;
43     }
44
45 private:
46     A *pA;
47     B *pB;
48     C *pC;
49 };
50
51
52 void FacadeTest(){
53     Facade *facade = new Facade();
54     facade->show();
55
56     delete facade;
57 }
58
59 #endif