【设计模式】Factory Pattern

#include "Factory.h"
#include "Product.h"
#include <iostream>
using namespace std;

int main(int argc, char *argv[]) {
    
    Factory *fac = new ConcreateFactory();

    Product *p = fac->CreateProduct();

    return 0;
}

#ifndef _PRODUCT_H
#define _PRODUCT_H

class Product {
public :
    virtual ~Product() = 0;
protected :
    Product();
};

class ConcreateProduct :public Product {
public :
    ~ConcreateProduct();
    
    ConcreateProduct();
};

#endif

#include "Product.h"
#include <iostream>
using namespace std;

Product::Product() {}

Product::~Product() {}

ConcreateProduct::ConcreateProduct() {
    cout << "ConcreateProduct..." << endl;
}

ConcreateProduct::~ConcreateProduct() {}

#ifndef _FACTORY_H
#define _FACTORY_H

class Product;

class Factory {
public :
    virtual ~Factory() = 0;

    virtual Product *CreateProduct() = 0;
protected:
    Factory();
};

class ConcreateFactory :public Factory {
public :
    ~ConcreateFactory();
    
    ConcreateFactory();

    Product *CreateProduct();
};

#endif

#include "Factory.h"
#include "Product.h"
#include <iostream>
using namespace std;

Factory::Factory() {}

Factory::~Factory() {}

ConcreateFactory::ConcreateFactory() {}

ConcreateFactory::~ConcreateFactory() {}

Product *ConcreateFactory::CreateProduct() {
    return new ConcreateProduct();
}