1 #include <iostream>
2 using namespace std;
3
4
5 struct person{
6 int head;
7 int body;
8 };
9 class Builder
10 {
11 public:
12 virtual void BuildHead() {}
13 virtual void BuildBody() {}
14 virtual person* get()=0;
15 virtual ~Builder(){}
16 };
17 //构造瘦人
18 class ThinBuilder : public Builder
19 {
20 public:
21 person * my;
22 ThinBuilder(){my=new person;}
23 virtual void BuildHead() { cout<<"build thin body"<<endl;my->body=3; }
24 virtual void BuildBody() { cout<<"build thin head"<<endl;my->head=5; }
25 virtual person* get(){return my;}
26 };
27
28
29 //构造胖人
30 class fatBuilder : public Builder
31 {
32 public:
33 person * my;
34 fatBuilder(){my=new person;}
35 virtual void BuildHead() { cout<<"build thin body"<<endl;my->body=30; }
36 virtual void BuildBody() { cout<<"build thin head"<<endl;my->head=50; }
37 virtual person* get(){return my;}
38 };
39
40
41 //构造的指挥官
42 class Director
43 {
44 private:
45 Builder *m_pBuilder;
46 public:
47 Director(Builder *builder) { m_pBuilder = builder; }
48 //两种create方法都可以，本质上是一样的
49 void Create(){
50 m_pBuilder->BuildHead();
51 m_pBuilder->BuildBody();
52 }
53
54 person* create2(){
55 m_pBuilder->BuildHead();
56 m_pBuilder->BuildBody();
57 return m_pBuilder->get();
58 }
59 };
60 int main()
61 {
62 ThinBuilder thin;
63 Director director(&thin);
64 director.Create();
65 person* tmp = thin.get();
66 cout << tmp->body << "\t" << tmp->head << endl;
67 delete tmp;
68
69 fatBuilder thin2;
70 Director director2(&thin2);
71 tmp = director2.create2();
72 cout << tmp->body << "\t" << tmp->head << endl;
73 delete tmp;
74 return 0;
75 }
