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;
}