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]$ ./builder118 Show..................119 Product: A Style!       B Style!        C Style