C++基础:构建者设计模式

#include <iostream>
#include <string>
using namespace std;
//构建者设计模式-一种工厂只生产一种复杂的产品
class robot
{public:string head;string upbody;string downbody;
};class robotBuilder
{private:robot *myRobot;public:robotBuilder()  //构造函数,为成员变量创建一片空间{myRobot=new robot();}~robotBuilder() //析构函数,释放空间,指针指向为空{delete myRobot;myRobot=NULL;}//成员函数robotBuilder *buildHead(string head){myRobot->head=head;return this;}robotBuilder *buildUpbody(string upbody){myRobot->upbody=upbody;return this;}robotBuilder *builddownbody(string downbody){myRobot->downbody=downbody;return this;}robot *build(){return myRobot;}};int main(){robotBuilder *builder=new robotBuilder();robot *robot001=builder->buildHead("美杜莎的头")->buildUpbody("哆啦A梦的上半身")->builddownbody("闪电侠的腿")->build();//最后返回robot的指针cout<<robot001->head<<"+"<<robot001->upbody<<"+"<<robot001->downbody;delete builder;    //new deletereturn 0;}