工厂模式

//工厂方法用于创建对象统一的接口//具体子类决定创建的对象#include <iostream>using namespace std;class Product{public:    Product(){}    virtual ~Product() = 0;};Product::~Product(){}class Factory{public:    Factory(){}    virtual ~Factory(){}    virtual Product* createProduct() = 0;};class Lenovo:public Product{public:    Lenovo(){cout << "a Lenovo computer created" << endl;}    ~Lenovo(){cout << "a Lenovo computer destoryed" << endl;}};class LenovoFactory:public Factory{public:    LenovoFactory(){}    ~LenovoFactory(){}    Product* createProduct(){        return new Lenovo();    }};int main(){    //根据具体的需要创建具体的工厂    Factory* f = new LenovoFactory;    //调用接口创建产品    Product* p = f->createProduct();    delete p;    delete f;    return 0;}