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<< "!	"<< m_b<< "!	"<< 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() = 0;
        virtual void BuildPartB() = 0;
        virtual void BuildPartC() = 0;

        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 0;
}
//////////////////////////////////////
[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