设计模式 --> （6）原型模式

#include <iostream>
using namespace std;

// 原型模式，本质就是深拷贝

// 深拷贝，正确的原型模式
class PrototypeRight
{
private:
    int a;
    int *p; // 有一个指针
public:
    PrototypeRight()
    {
        a = 3;
        p = new int(2);
    }

    // 不使用默认的拷贝构造函数！
    PrototypeRight(const PrototypeRight& obj)
    {
        a = obj.a;
        p = new int(*obj.p);
    }
    
    void outputPointerAddress()
    {
        cout << p << endl;
    }
    
    ~PrototypeRight()
    {
        delete p;
    }
};



int main()
{
    // 这一部分是正确的原型模式的测试样例
    PrototypeRight p1;
    PrototypeRight p2 = p1;
    p1.outputPointerAddress();
    p2.outputPointerAddress();
    return 0;
}

// 0x580f28
// 0x580fa8

/* 
    原型模式：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 
    Created by Phoenix_FuliMa 
*/  
  
#include <iostream>
#include <string>
using namespace std;
  
class Prototype
{
public:  
    virtual Prototype *Clone() = 0;
    virtual void display() = 0;
};

class Prototype1:public Prototype
{
protected:
    string name;
    int id;
public:
    Prototype1(string name, int id)
    {
        this->name = name;
        this->id = id;
    }
    Prototype1(const Prototype1&type)
    {  
        this->name = type.name;  
        this->id   = type.id;  
    }  
  
    virtual void display()  
    {  
        cout<<"my name and id are : " << this->id<<" "<< this->name <<endl;  
    }  
    Prototype *Clone()  
    {  
        return new Prototype1(*this);  
    }  
};  
  
class Prototype2:public Prototype  
{  
protected:  
    string name;  
public:  
    Prototype2(string name)  
    {  
        this->name = name;  
    }  
    Prototype2(const Prototype2&type)  
    {  
        this->name = type.name;  
    }  
  
    virtual void display()  
    {  
        cout<<"my name is : "<< this->name <<endl;  
    }  
    Prototype *Clone()  
    {  
        return new Prototype2(*this);  
    }  
};  
  
int main()  
{  
    Prototype *obj1 = new Prototype1("mafuli", 1);  
    Prototype *obj2 = obj1->Clone();  
    Prototype *obj3 = obj2->Clone();  
  
    obj1->display();  
    obj2->display();  
    obj3->display();  
  
    Prototype *obj4 = new Prototype2("fulima");  
    Prototype *obj5 = obj4->Clone();  
    Prototype *obj6 = obj5->Clone();  
  
    obj4->display();  
    obj5->display();  
    obj6->display();  
      
    delete obj1;  
    delete obj2;  
    delete obj3;  
    delete obj4;  
    delete obj5;  
    delete obj6; 
  
    system("pause");  
    return 0;  
}  
  
/* 
my name and id are : 1 mafuli 
my name and id are : 1 mafuli 
my name and id are : 1 mafuli 
my name is : fulima 
my name is : fulima 
my name is : fulima 
*/