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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.  
  5. class BaseClass {
  6. public:
  7. 	BaseClass() { cout << "Constructor BaseClass" << endl; }
  8. 	virtual void Tell() { cout << "I'm BaseClass" << endl; }
  9. };
  10.  
  11. class ClassA: public BaseClass {
  12. public:
  13. 			ClassA() { cout << "Constructor ClassA" << endl; }
  14. 	void	Tell() { cout << "I'm ClassA" << endl; }
  15. };
  16.  
  17. class ClassB: public BaseClass {
  18. public:
  19. 			ClassB() { cout << "Constructor ClassB" << endl; }
  20. 	void	Tell() { cout << "I'm ClassB" << endl; }
  21. };
  22.  
  23.  
  24. class BaseFactory {
  25. public:
  26. 	BaseFactory() { cout << "BaseFactory constructor" << endl; }
  27. 	virtual void		Tell() const { cout << "I'm BaseFactory" << endl; }
  28. 	virtual BaseClass * Produce() const { return new BaseClass(); }
  29. };
  30.  
  31. class FactoryA: public BaseFactory {
  32. public:
  33. 				FactoryA() { cout << "FactoryA constructor" << endl; }
  34. 	void		Tell() const { cout << "I'm FactoryA" << endl; }
  35. 	BaseClass * Produce() const { 
  36. 		cout << "FactoryA produce:" << endl;
  37. 		return new ClassA(); 
  38. 	}
  39. };
  40.  
  41. class FactoryB: public BaseFactory {
  42. public:
  43. 				FactoryB() { cout << "FactoryB constructor" << endl; }
  44. 	void		Tell() const { cout << "I'm FactoryB" << endl; }
  45. 	BaseClass * Produce() const { 
  46. 		cout << "FactoryA produce:" << endl;
  47. 		return new ClassB();
  48. 	}
  49. };
  50.  
  51.  
  52. static BaseFactory * factoryA = new FactoryA();
  53. static BaseFactory * factoryB = new FactoryB();
  54.  
  55.  
  56. void CreateSome( BaseClass* &object, const BaseFactory& SomeFactory ) {
  57. 	SomeFactory.Tell();
  58. 	object = SomeFactory.Produce();
  59. }
  60.  
  61. int main()
  62. {
  63. 	BaseClass* T;
  64. 	CreateSome(T, *factoryA);
  65. 	T->Tell();
  66. }
Success #stdin #stdout 0s 3472KB
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Standard input is empty
stdout
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BaseFactory constructor
FactoryA constructor
BaseFactory constructor
FactoryB constructor
I'm FactoryA
FactoryA produce:
Constructor BaseClass
Constructor ClassA
I'm ClassA
https://ideone.com/VDRBX2
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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