C + + design pattern Shallow knowledge builder mode

Builder mode: Separates the construction of a complex object from its representation so that the same build process can create different representations.

Pattern implementation:

[Code]class builder;//Product class product{public:void Addpart (const char *info) {m_partinfovec.push_back (info); } void Showproduct () {for (std::vector<const char *>::iterator item = M_partinfovec.begin (); Item! = M_par Tinfovec.end ();        ++item) {std::cout << *item << Std::endl; }}private:std::vector<const Char *> m_partinfovec;};/ /builder Builder, Unified abstract interface class builder{public:virtual void Buildparta () {} virtual void Buildpartb () {} virtual product* GetProduct () {return null;}};/    /Concrete Created Object method class Concretebuilder:public Builder{public:concretebuilder () {m_product = new Product ();}    void Buildparta () {M_product->addpart ("Parta completed");    } void Buildpartb () {m_product->addpart ("PartB Q");    } product* GetProduct () {return m_product; }private:product *m_product;};/    /director controls the creation of the concrete Construction object class Director{public:director (Builder *builder) {m_builder = builder;} void CreAteproduct () {M_builder->buildparta ();    M_BUILDER-&GT;BUILDPARTB (); }private:builder *m_builder;};

Client:

[Code]int Main () {    Builder *builderobj =  new ConcreteBuilder ();    Director directorobj (builderobj);    Directorobj.createproduct ();    Product *productobj = Builderobj->getproduct ();    if (productobj = = NULL)    {        return 0;    }    Productobj->showproduct ();    Delete productobj;    Productobj = NULL;    Delete builderobj;    Builderobj = NULL;}

The above is the C + + design mode of knowledge of the content of the builder model, more relevant content please pay attention to topic.alibabacloud.com (www.php.cn)!

