设计模式之建造者模式(Builder)

建造者模式原理：建造模式主要是用于产生对象的各个组成部分，而抽象工厂模式则用于产生一系列对象，建造者模式而且要求这些对象的组成部分有序。

代码如下：

#include <iostream>
using namespace std;class Builder
{
public:virtual void buildHead(){}virtual void buildBody(){}virtual void buildLeftArm(){}virtual void buildRightArm(){}virtual void buildLeftLeg(){}virtual void buildRightLeg(){}
};
class BuilderFat:public Builder
{
public:virtual void buildHead(){cout << "fat head" <<endl;}virtual void buildBody(){cout << "fat Body" << endl;}virtual void buildLeftArm(){cout << "fat Left Arm" <<endl;}virtual void buildRightArm(){cout << "fat Right Arm" <<endl;}virtual void buildLeftLeg(){cout << "fat Left Leg" <<endl;}virtual void buildRightLeg(){cout << "fat Right leg" <<endl;}
};class BuilerThin:public Builder
{
public:virtual void buildHead(){cout << " thin head" <<endl;}virtual void buildBody(){cout << "thin Body" << endl;}virtual void buildLeftArm(){cout << "thin Left Arm" <<endl;}virtual void buildRightArm(){cout << "thin Right Arm" <<endl;}virtual void buildLeftLeg(){cout << "thin Left Leg" <<endl;}virtual void buildRightLeg(){cout << "thin Right leg" <<endl;}
};class Director
{
public:Director(Builder *ptmp = NULL):pBuilder(ptmp){}void createPerson(){pBuilder->buildHead();pBuilder->buildBody();pBuilder->buildLeftArm();pBuilder->buildRightArm();pBuilder->buildRightArm();pBuilder->buildLeftLeg();pBuilder->buildRightLeg();}
private:Builder* pBuilder;
};int main()
{BuilderFat fat;Director *pDirector = new Director(&fat);pDirector->createPerson();delete pDirector;return 0;
}