设计模式——建造者模式/生成器模式（C++实现）

 #include <iostream>
 #include <string>

 using namespace std;

 class STProduct
 {
 public:
         void setA(string str)
         {
                 m_a = str;
         }

         void setB(string str)
         {
                 m_b = str;
         }

         void setC(string str)
         {
                 m_c = str;
         }

         void Show()
         {
                 cout<< "Product: "<< m_a<< "!\t"<< m_b<< "!\t"<< m_c<< endl;
         }

 private:
         string m_a;
         string m_b;
         string m_c;
 };

 class STBuilder
 {
 public:
         STBuilder()
         {
                 m_pstProduct = new STProduct();
         }
         virtual ~STBuilder()
         {
                 delete m_pstProduct;
         }

         virtual void BuildPartA() = ;
         virtual void BuildPartB() = ;
         virtual void BuildPartC() = ;

         virtual STProduct* GetResult()
         {
                 return m_pstProduct;
         }

         STProduct* m_pstProduct;
 };

 class STConcreteBuilder: public STBuilder
 {
 public:
         virtual void BuildPartA()
         {
                 m_pstProduct->setA("A Style");
         }

         virtual void BuildPartB()
         {
                 m_pstProduct->setB("B Style");
         }

         virtual void BuildPartC()
         {
                 m_pstProduct->setC("C Style");
         }
 };

 class STDirector
 {
 public:
         ~STDirector()
         {
                 delete m_pstBuilder;
         }

         void SetBuilder(STBuilder* pstTmpBuilder)
         {
                 m_pstBuilder = pstTmpBuilder;
         }

         STProduct* Construct()
         {
                 m_pstBuilder->BuildPartA();
                 m_pstBuilder->BuildPartB();
                 m_pstBuilder->BuildPartC();

                 return m_pstBuilder->GetResult();
         }

         STBuilder* m_pstBuilder;
 };

 int main(int argc, char* argv[])
 {
         STBuilder* pstBuilder = new STConcreteBuilder();

         STDirector* pstDirector = new STDirector();
         pstDirector->SetBuilder(pstBuilder);

         STProduct* pstProduct = pstDirector->Construct();
         cout<< "Show.................."<< endl;
         pstProduct->Show();

         return ;
 }
 //////////////////////////////////////
 [root@ ~/learn_code/design_pattern/10_builder]$ ./builder
 Show..................
 Product: A Style!       B Style!        C Style

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