設計模式——建造者模式/生成器模式（C++實現）

  1 #include <iostream>
  2 #include <string>
  3 
  4 using namespace std;
  5 
  6 class STProduct
  7 {
  8 public:
  9         void setA(string str)
 10         {
 11                 m_a = str;
 12         }
 13 
 14         void setB(string str)
 15         {
 16                 m_b = str;
 17         }
 18 
 19         void setC(string str)
 20         {
 21                 m_c = str;
 22         }
 23 
 24         void Show()
 25         {
 26                 cout<< "Product: "<< m_a<< "!\t"<< m_b<< "!\t"<< m_c<< endl;
 27         }
 28 
 29 private:
 30         string m_a;
 31         string m_b;
 32         string m_c;
 33 };
 34 
 35 class STBuilder
 36 {
 37 public:
 38         STBuilder()
 39         {
 40                 m_pstProduct = new STProduct();
 41         }
 42         virtual ~STBuilder()
 43         {
 44                 delete m_pstProduct;
 45         }
 46 
 47         virtual void BuildPartA() = 0;
 48         virtual void BuildPartB() = 0;
 49         virtual void BuildPartC() = 0;
 50 
 51         virtual STProduct* GetResult()
 52         {
 53                 return m_pstProduct;
 54         }
 55 
 56         STProduct* m_pstProduct;
 57 };
 58 
 59 class STConcreteBuilder: public STBuilder
 60 {
 61 public:
 62         virtual void BuildPartA()
 63         {
 64                 m_pstProduct->setA("A Style");
 65         }
 66 
 67         virtual void BuildPartB()
 68         {
 69                 m_pstProduct->setB("B Style");
 70         }
 71 
 72         virtual void BuildPartC()
 73         {
 74                 m_pstProduct->setC("C Style");
 75         }
 76 };
 77 
 78 class STDirector
 79 {
 80 public:
 81         ~STDirector()
 82         {
 83                 delete m_pstBuilder;
 84         }
 85 
 86         void SetBuilder(STBuilder* pstTmpBuilder)
 87         {
 88                 m_pstBuilder = pstTmpBuilder;
 89         }
 90 
 91         STProduct* Construct()
 92         {
 93                 m_pstBuilder->BuildPartA();
 94                 m_pstBuilder->BuildPartB();
 95                 m_pstBuilder->BuildPartC();
 96 
 97                 return m_pstBuilder->GetResult();
 98         }
 99 
100         STBuilder* m_pstBuilder;
101 };
102 
103 int main(int argc, char* argv[])
104 {
105         STBuilder* pstBuilder = new STConcreteBuilder();
106 
107         STDirector* pstDirector = new STDirector();
108         pstDirector->SetBuilder(pstBuilder);
109 
110         STProduct* pstProduct = pstDirector->Construct();
111         cout<< "Show.................."<< endl;
112         pstProduct->Show();
113 
114         return 0;
115 }
116 //////////////////////////////////////
117 [root@ ~/learn_code/design_pattern/10_builder]$ ./builder
118 Show..................
119 Product: A Style!       B Style!        C Style

參考：http://design-patterns.readthedocs.io/zh_CN/latest/creational_patterns/builder.html