[设计模式]设计模式课程（十）--构建器模式

 1 class House{
 2     //....
 3 };
 4 
 5 class HouseBuilder {
 6 public:
 7     House* GetResult(){
 8         return pHouse;
 9     }
10     virtual ~HouseBuilder(){}
11 protected:
12     
13     House* pHouse;
14     virtual void BuildPart1()=0;
15     virtual void BuildPart2()=0;
16     virtual void BuildPart3()=0;
17     virtual void BuildPart4()=0;
18     virtual void BuildPart5()=0;
19     
20 };
21 
22 class StoneHouse: public House{
23     
24 };
25 
26 class StoneHouseBuilder: public HouseBuilder{
27 protected:
28     
29     virtual void BuildPart1(){
30         //pHouse->Part1 = ...;
31     }
32     virtual void BuildPart2(){
33         
34     }
35     virtual void BuildPart3(){
36         
37     }
38     virtual void BuildPart4(){
39         
40     }
41     virtual void BuildPart5(){
42         
43     }
44     
45 };
46 
47 
48 class HouseDirector{
49     
50 public:
51     HouseBuilder* pHouseBuilder;
52     
53     HouseDirector(HouseBuilder* pHouseBuilder){
54         this->pHouseBuilder=pHouseBuilder;
55     }
56     
57     House* Construct(){
58         
59         pHouseBuilder->BuildPart1();
60         
61         for (int i = 0; i < 4; i++){
62             pHouseBuilder->BuildPart2();
63         }
64         
65         bool flag=pHouseBuilder->BuildPart3();
66         
67         if(flag){
68             pHouseBuilder->BuildPart4();
69         }
70         
71         pHouseBuilder->BuildPart5();
72         
73         return pHouseBuilder->GetResult();
74     }
75 };