1 #include <iostream>
2 #include <string>
3 using namespace std;
4
5 //product
6 class Shape
7 {
8 public:
9 virtual void draw() = 0;
10 virtual ~Shape() {}
11 };
12
13 class Circle : public Shape
14 {
15 public:
16 void draw() { cout << "Circle::draw" << endl; }
17 ~Circle() { cout << "Circle::~Circle" << endl; }
18 private:
19 Circle() {}
20 friend class CircleFactory;
21 };
22
23 class Square : public Shape
24 {
25 public:
26 void draw() { cout << "Square::draw" << endl; }
27 ~Square() { cout << "Square::~Square" << endl; }
28 private:
29 Square() {}
30 friend class SqureFactory;
31 };
32
33 //factory
34 class Factory
35 {
36 public:
37 virtual Shape* create() = 0;
38 };
39
40 class CircleFactory : public Factory
41 {
42 public:
43 Shape* create(){return new Circle;}
44 };
45
46 class SqureFactory : public Factory
47 {
48 public:
49 Shape* create(){return new Square;}
50 };
51
52 int main()
53 {
54 Factory *pFactory = new CircleFactory;//SqureFactory;
55
56 Shape* pShape = pFactory->create();
57
58 pShape->draw();
59
60 delete pShape;
61 delete pFactory;
62
63 return 0;
64 }
