简单工厂模式

#include <iostream>
#include <string>


using namespace std;


struct AbstractProduct {
    virtual void operation() = 0;
};

struct ProductA : public AbstractProduct {
    void operation() {
        cout << "ProductA" << endl;
    }
};

struct ProductB : public AbstractProduct {
    void operation() {
        cout << "ProductB" << endl;
    }
};


struct AbstractFactory {
    virtual AbstractProduct *createProduct(int type) = 0;
};

struct SimpleFactory : public AbstractFactory {
    AbstractProduct *createProduct(int type) {
        switch (type) {
            case 1: new ProductA(); break;
            case 2: new ProductB(); break;
            default: break;
        }
    }
};


int main(int argc, char **argv)
{
    AbstractFactory *factory = new SimpleFactory();

    AbstractProduct *p1 = factory->createProduct(1);
    p1->operation();
    delete p1;

    AbstractProduct *p2 = factory->createProduct(2);
    p2->operation();
    delete p2;

    delete factory;

    return 0;
}