原型模式（ProtoType）

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1.目的

当需要从一个对象copy出另外一个对象时，可以使用原型模式，本质上是调用的copy构造函数

与copy构造函数的区别，可能就是不需要显示的生成对象，而是通过函数调用（？）

2.代码

prototype.h

#ifndef PROTOTYPE_H_#define PROTOTYPE_H_#include <string>#include <iostream>using namespace std;class Resume{public:Resume(string name, string sex, string age):name(name), sex(sex),age(age){}Resume(const Resume& arg){this->name = arg.name;this->age = arg.age;this->sex = arg.sex;this->workExperience = arg.workExperience;}void setWorkExperience(string arg){workExperience = arg;}Resume& clone() const{return *(new Resume(*this));}void show(){cout<<name<<" "<<sex<<" "<<age<<endl;cout<<workExperience<<endl;}private:string name;string sex;string age;string workExperience;};#endif /* PROTOTYPE_H_ */

prototype.cpp

#include "ProtoType.h"void protoType(){Resume a("Tom", "male", "30");a.setWorkExperience("1998-2000, Company A");Resume b = a.clone();b.setWorkExperience("2000-2002, Company B");Resume c = a.clone();c.setWorkExperience("2002-2004, Company C");a.show();b.show();c.show();}

执行效果：

Tom male 30
1998-2000, Company A
Tom male 30
2000-2002, Company B
Tom male 30
2002-2004, Company C

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