设计模式C++实现六： 原型模式

原型模式（Prototype）：用原型实例指定创建对象的种类，并且通过拷贝这些原型创建新的对象。原型模式其实就是从一个对象再创建另一个可定制的对象，而且不需知道创建的具体细节。

#ifndef PROTOTYPE_H#define PROTOTYPE_H#include<iostream>#include<string>using namespace std;class Resume{string name;string sex;string age;string timeArea;string company;public:Resume(){}~Resume(){cout << name << " " << sex << " " << age << endl;cout << "WorkExperience: " << timeArea << " " << company << " destory!\n\n";}Resume(string n) : name(n){}Resume(Resume & n);void SetPersonalInfo(string sex, string age){ this->sex = sex; this->age = age; }void SetWorkExperience(string T, string com){ this->timeArea = T; this->company = com; }void Display()const;Resume Clone()const;void operator =(Resume & res);};void Resume::Display()const{cout << name << " " << sex << " " << age << endl;cout << "WorkExperience: " << timeArea << " " << company << endl;}Resume Resume::Clone()const{Resume Temp(name);Temp.age = age;Temp.sex = sex;Temp.company = company;Temp.timeArea = timeArea;Temp.name = name;return Temp;}void Resume::operator =(Resume & res){age = res.age;sex = res.sex;company = res.company;timeArea = res.timeArea;}Resume::Resume(Resume & n){if (this == &n)return;this->age = n.age;this->company = n.company;this->timeArea = n.timeArea;this->sex = n.sex;this->name = n.name;}#endif

#include"Prototype.h"int main(){Resume a("BigBird");a.SetPersonalInfo("man", "29");a.SetWorkExperience("1998-2000", "xx company");a.Display();//使用Clone函数会有一个中间的Resume对象产生，析构时会出现两个a的析构//Resume b = a.Clone();//b.SetWorkExperience("1998-2006", "yy company");//b.Display();//使用构造函数不会有一个中间的Resume对象产生，析构时会出现只有一个a的析构，而且会在c析构后才对a析构Resume c(a);c.SetPersonalInfo("man", "24");c.Display();return 0;}