企业官网建设流程全解析

一、目的：

（1） 通过复制这些原型对象创建新对象。

（2）当实例化的类是在运行是指定时就可以通过这种方式

#include<iostream> #include<string> #include<unordered_map> using namespace std; class Something{ public: Something(int id,string type):m_id(id),m_type(type){cout<<"Something构造函数被调用"<<endl;} virtual ~Something(){cout<<"Something析构函数调用"<<endl;} virtual Something* clone()=0; virtual string who()=0; virtual int typeId()=0; Something(const Something& something){ this->m_id= something.m_id; this->m_type=something.m_type; cout<<"Something拷贝构造调用"<<endl; } protected: int m_id; string m_type; }; class Human:public Something{ public: Human(int id,string type):Something(id,type){cout<<"Human构造数被调用"<<endl;} Human(const Human& human):Something(human){cout<<"Human拷贝构造函数调用"<<endl;} virtual Something* clone() override {return new Human(*this);} virtual string who() override {return m_type;} virtual int typeId() override{return m_id;} ~Human(){cout<<"Human析构函数被调用"<<endl;} }; class Dog:public Something{ public: Dog(int id,string type):Something(id,type){cout<<"dog构造函数被调用"<<endl;} Dog(const Dog& dog):Something(dog){cout<<"dog拷贝构造函数被调用"<<endl;} ~Dog(){cout<<"Dog析构被调用"<<endl;} virtual string who() override {return m_type;} virtual int typeId() override{return m_id;} virtual Something* clone() override {return new Dog(*this);} }; class All{ public: ~All(){ //析构函数 for (auto& x : m_SomeMap) { delete x.second; x.second = nullptr; } } All() //构造函数 { Human* human = new Human{1, "人类" }; Dog* dog = new Dog{2,"狗类"}; m_SomeMap.emplace(human->who(), human); m_SomeMap.emplace(dog->who(), dog); } //根据你所需要的种类来获得克隆对象 Something* getSome(string Type){return m_SomeMap[Type]->clone();} private: unordered_map<string, Something*> m_SomeMap; }; int main(int agv,char* agc[]){ cout << "开始测试"<<endl; All factory; // 克隆人类 Something* p1 = factory.getSome("人类"); cout << "克隆类型：" << p1->who() << " id:" << p1->typeId() << endl; delete p1; // 克隆狗 Something* p2 = factory.getSome("狗类"); cout << "克隆类型：" << p2->who() << " id:" << p2->typeId() << endl; delete p2; // 测试不存在类型 //Something* p3 = factory.getSome("猫类"); return 0; }

二、运行结果

kickpi@kickpi:~/test$ g++ prototype.cpp -o main2 kickpi@kickpi:~/test$ ./main2 开始测试 Something构造函数被调用 Human构造数被调用 Something构造函数被调用 dog构造函数被调用 Something拷贝构造调用 Human拷贝构造函数调用 克隆类型：人类 id:1 Human析构函数被调用 Something析构函数调用 Something拷贝构造调用 dog拷贝构造函数被调用 克隆类型：狗类 id:2 Dog析构被调用 Something析构函数调用 Dog析构被调用 Something析构函数调用 Human析构函数被调用 Something析构函数调用