c++ 创建型模式-建造者模式(Builder)

 1  #include <iostream>
 2 
 3  class  Product
 4  {
 5  public:
 6      Product() {}
 7      virtual ~Product() {}
 8      void setPartA(std::string param)
 9      {
10          m_partA = param;
11          std::cout << "m_partA = " << m_partA.c_str() << std::endl;
12      }
13      void setPartB(std::string param)
14      {
15          m_partB = param;
16          std::cout << "m_partB = " << m_partB.c_str() << std::endl;
17      }
18      void setPartC(std::string param)
19      {
20          m_partC = param;
21          std::cout << "m_partC = " << m_partC.c_str() << std::endl;
22      }
23  private:
24      std::string m_partA;
25      std::string m_partB;
26      std::string m_partC;
27  };
28  class Builder
29  {
30  public:
31      Builder() {}
32      virtual ~Builder() {}
33      virtual void BuildPartA() = 0;
34      virtual void BuildPartB() = 0;
35      virtual void BuildPartC() = 0;
36  };
37  class ConcreteBuilder : public Builder
38  {
39  public:
40      ConcreteBuilder() 
41      {
42          m_prouduct = new Product();
43      }
44      virtual ~ConcreteBuilder() 
45      {
46          if (m_prouduct)
47          {
48              delete m_prouduct;
49              std::cout << "delete m_prouduct" << std::endl;
50          }
51      }
52      virtual void BuildPartA()
53      {
54          m_prouduct->setPartA("BuidPartA by ConcreteBuilder");
55      }
56      virtual void BuildPartB()
57      {
58          m_prouduct->setPartB("BuidPartB by ConcreteBuilder");
59      }
60      virtual void BuildPartC()
61      {
62          m_prouduct->setPartC("BuidPartC by ConcreteBuilder");
63      }
64  private:
65      Product* m_prouduct;
66  };
67  class  Director
68  {
69  public:
70      Director(Builder* builder):m_builder(builder)
71      {
72      }
73      virtual ~Director() 
74      {
75          if (m_builder)
76          {
77              delete m_builder;
78              std::cout << "delete m_builder" << std::endl;
79         }
80      }
81      void Construct()
82      {
83          m_builder->BuildPartA();
84          m_builder->BuildPartB();
85          m_builder->BuildPartC();
86      }
87  private:
88      Builder* m_builder;
89  };
90  
91  int main()
92  {
93      Builder* builder = new ConcreteBuilder();
94      Director* dirctor = new Director(builder);
95      dirctor->Construct();
96      delete dirctor;
97      system("pause");
98  }