（五）适配器模式-C++实现

 1 #ifndef _TARGET_H_
 2 #define _TARGET_H_
 3 #include <iostream>
 4 #include <string>
 5 using namespace std;
 6 //目标 （就是适配成这样的，都使用这种）
 7 class ThreeElectricOutlet{
 8 public:
 9     virtual void connectElectricCurrent() = 0;
10 
11 };
12 
13 //被适配者 （现在不能使用它，把它适配为可以使用）
14 class TwoElectricOutlet{
15 public:
16     virtual void connectElectricCurrent() = 0;
17 };
18 
19 //适配器
20 class ThreeElectricAdapter : public ThreeElectricOutlet{
21 private:
22     TwoElectricOutlet *myOutlet; 
23 
24 public:
25     ThreeElectricAdapter(TwoElectricOutlet *outlet);
26     void connectElectricCurrent() override;
27 };
28 
29 //具体目标
30 class Wash : public ThreeElectricOutlet{
31 public:
32     Wash();
33     Wash(string s);
34     void connectElectricCurrent() override;
35 
36 private:
37     string name;
38 
39 
40 };
41 
42 //具体被适配者
43 class Tv : public TwoElectricOutlet{
44 public:
45     Tv();
46     Tv(string s);
47     void connectElectricCurrent() override;
48 private:
49     string name;
50 
51 };
52 
53 
54 
55 #endif

 1 #include "Target.h"
 2 
 3 ThreeElectricAdapter::ThreeElectricAdapter(TwoElectricOutlet *outlet)
 4 {
 5     myOutlet = outlet;
 6 }
 7 
 8 void ThreeElectricAdapter::connectElectricCurrent()
 9 {
10     myOutlet->connectElectricCurrent();
11 }
12 
13 Wash::Wash()
14 {
15     name = "洗衣机";
16 }
17 Wash::Wash(string s)
18 {
19     name = s;
20 }
21 
22 void Wash::connectElectricCurrent()
23 {
24     cout << name << "begin wash" << endl;
25 }
26 
27 Tv::Tv()
28 {
29     name = "电视机";
30 }
31 
32 Tv::Tv(string s)
33 {
34     name = s;
35 }
36 
37 void Tv::connectElectricCurrent()
38 {
39     cout << name << "begin play video" << endl;
40 }

 1 #include "Target.h"
 2 
 3 int main()
 4 {
 5     ThreeElectricOutlet *outlet; //现在只能使用的目标 其它的也将适配为这个目标
 6     Wash *wash = new Wash();    //洗衣机本来就是使用的三相电（即继承的是ThreeElectricOutlet）
 7     outlet = wash;
 8     cout << "use three electric :" << endl;
 9     outlet->connectElectricCurrent();
10 
11     Tv *tv = new Tv();        //电视只能使用两相电 现在将其适配为三相电
12     ThreeElectricAdapter *adapter = new ThreeElectricAdapter(tv);
13     outlet = adapter;
14     cout << "use three electric :" << endl;
15     outlet->connectElectricCurrent();
16     return 0;
17 }