Prototype 模式

Prototype 模式提供了一个通过已存在对象进行新对象创建的接口(Clone) ,Clone()实现和具体的实现语言相关,在 C++中我们将通过拷贝构造函数实现之。

////////////////Prototype.h///////
#ifndef _PROTOTYPE_H_
#define _PROTOTYPE_H_
class Prototype
{
public:
    virtual ~Prototype();
    virtual Prototype* Clone() const = 0 ;
protected:
    Prototype();
private:
};

class ConcretePrototype : public Prototype
{
public:
    ~ConcretePrototype();
    ConcretePrototype();
    ConcretePrototype(const ConcretePrototype& cp);
    Prototype* Clone() const;
protected:
private:
};


#endif
 1 ////////////////Prototype.cpp///////
 2 #include "Prototype.h"
 3 #include <iostream>
 4 using namespace std;
 5 
 6 
 7 Prototype::~Prototype()
 8 {
 9 
10 }
11 Prototype::Prototype()
12 {
13 
14 }
15 Prototype* Prototype::Clone() const
16 {
17     return 0;
18 }
19 ConcretePrototype::~ConcretePrototype()
20 {
21 
22 }
23 ConcretePrototype::ConcretePrototype()
24 {
25     cout<<"创建一个对象"<<endl;
26 }
27 ConcretePrototype::ConcretePrototype(const ConcretePrototype& cp)
28 {
29     cout<<"复制原型"<<endl; 
30 }
31 Prototype* ConcretePrototype::Clone() const
32 {
33     return new ConcretePrototype(*this);
34 }
 1 ////////////////main.cpp///////
 2 #include "Prototype.h"
 3 #include <iostream>
 4 using namespace std;
 5 
 6 int main()
 7 {
 8     Prototype* p = new ConcretePrototype();
 9     Prototype* p1 = p->Clone();
10     Prototype* p2 = p1->Clone();
11 
12     system("pause");
13     return 0 ;
14 }
原文地址:https://www.cnblogs.com/csxcode/p/3696735.html