1 #ifndef FACTORYMETHOD_H
2 #define FACTORYMETHOD_H
3
4 #include<iostream>
5 using namespace std;
6
7 class Product//should be a pure virtual class.
8 {
9 public:
10 Product(){}
11 ~Product(){}
12 };
13
14 class ConcreteProductA:public Product
15 {
16 public:
17 ConcreteProductA()
18 {
19 cout<<"ConcreteProductA is created."<<endl;
20 }
21 };
22
23 class ConcreteProductB:public Product
24 {
25 public:
26 ConcreteProductB()
27 {
28 cout<<"ConcreteProductB is created."<<endl;
29 }
30 };
31
32 class Creator
33 {
34 public:
35 virtual Product* createProduct()=0;
36 };
37
38 class ConcreteCreatorA:public Creator
39 {
40 public:
41 Product* createProduct()
42 {
43 return new ConcreteProductA();
44 }
45 };
46
47 class ConcreteCreatorB:public Creator
48 {
49 public:
50 Product* createProduct()
51 {
52 return new ConcreteProductB();
53 }
54 };
55
56 #endif//FACTORYMETHOD_H
57
58 int main()
59 {
60 Creator* creator=new ConcreteCreatorA();
61 creator->createProduct();
62 cout<<endl;
63
64 creator=new ConcreteCreatorB();
65 creator->createProduct();
66
67 return 0;
68 }
