Type: Creational

Builder: 將一個復雜對象的構建與它的表示分離,使得同樣的構建過程可以創建不同的表示。是為了將構建復雜對象的過程和它的部件解耦。Builder負責構建部件，Director負責處理構建的過程。

#include <iostream> using namespace std;class Part{};class Product { public:Product(Part* pPartA, Part* pPartB, Part* pPartC){}; };class Builder { public:virtual void buildPartA()=0;virtual void buildPartB()=0;virtual void buildPartC()=0; };class ConcreteBuilder: public Builder { public:void buildPartA(){cout<<"Build Part A"<<endl;mPartA = new Part;};void buildPartB(){cout<<"Build Part B"<<endl;mPartB = new Part;};void buildPartC(){cout<<"Build Part C"<<endl;mPartC = new Part;};Product* getResult(){cout<<"Get Result"<<endl;return new Product(mPartA, mPartB, mPartC);}; private:Part *mPartA, *mPartB, *mPartC; };class Director { public:Director(Builder* pBuilder):m_pBuilder(pBuilder){};void construct(){cout<<"Director construct"<<endl;m_pBuilder->buildPartA();m_pBuilder->buildPartB();m_pBuilder->buildPartC();}; private:Builder* m_pBuilder; };int main() {ConcreteBuilder* pBuilder = new ConcreteBuilder;Director *pDirector = new Director(pBuilder);pDirector->construct();pBuilder->getResult();system("pause");return 0; }

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