【1】什么是建造者模式？将一个复杂对象的构建与它的表示分离，使得同样的构建过程可以创建不同的表示。【2】建造者模式代码示例：代码示例1：
#include#include #include using namespace std;class Person{public: virtual void createHead() = 0; virtual void createHand() = 0; virtual void createBody() = 0; virtual void createFoot() = 0;};class ThinPerson : public Person{ void createHead() { cout << "thin head" << endl; } void createHand() { cout << "thin hand" << endl; } void createBody() { cout << "thin body" << endl; } void createFoot() { cout << "thin foot" << endl; }};class FatPerson : public Person{ void createHead() { cout << "fat head" << endl; } void createHand() { cout << "fat hand" << endl; } void createBody() { cout << "fat body" << endl; } void createFoot() { cout << "fat foot" << endl; }};class Director{private: Person *p;public: Director(Person *temp) { p = temp; } void create() { p->createHead(); p->createHand(); p->createBody(); p->createFoot(); }};//客户端代码：int main(){ Person *p = new FatPerson(); Person *b = new ThinPerson(); Director *d = new Director(p); Director *s = new Director(b); d->create(); s->create(); delete d; delete p; delete s; delete b; return 0;}
代码示例2：#include#include #include using namespace std;class Product{private: vector product;public: void add(string str) { product.push_back(str); } void show() { vector ::iterator iter = product.begin(); while (iter != product.end()) { cout << *iter << " "; ++iter; } cout << endl; }};class Builder{public: virtual void builderA() = 0; virtual void builderB() = 0; virtual Product *getResult() = 0;};class ConcreteBuilder1 : public Builder{private: Product *product;public: ConcreteBuilder1() { product = new Product(); } virtual void builderA() { product->add("one"); } virtual void builderB() { product->add("two"); } virtual Product *getResult() { return product; }};class ConcreteBuilder2 : public Builder{private: Product *product;public: ConcreteBuilder2() { product = new Product(); } virtual void builderA() { product->add("A"); } virtual void builderB() { product->add("B"); } virtual Product *getResult() { return product; }};class Director{private: Product *p;public: void construct(Builder *bd) { bd->builderA(); bd->builderB(); p = bd->getResult(); } Product *getResult() { return p; }};int main(){ Director *director = new Director(); Builder *bd1 = new ConcreteBuilder1(); director->construct(bd1); Product *pbd1 = director->getResult(); pbd1->show(); return 0;}