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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct Point { double x, y; };
  5. class Shape
  6. {
  7. public:
  8. 	Point* arc;
  9. 	char Id;
  10. 	virtual void info() = 0;
  11. 	virtual ~Shape() {}
  12. 	static Shape* createShape(char);
  13. 	virtual int getArea() { return 0; }
  14. };
  15.  
  16. class Rectangle : public Shape
  17. {
  18. public:
  19. 	void info() { cout << "Четырехугольник" << endl; }
  20. 	Rectangle() { Id = 'R';
  21. 	arc = new Point[4];
  22. 	cout << "Вершина 1"; cin >> arc[0].x;/*... */ }
  23. 	int getArea() { return 4; }
  24. 	~Rectangle() { delete[] arc; }
  25. };
  26.  
  27. class Triangle : public Shape
  28. {
  29. public:
  30. 	void info() { cout << "Треугольник" << endl; }
  31. };
  32.  
  33. class Octagon : public Shape
  34. {
  35. public:
  36. 	void info() { cout << "Восьмиугольник" << endl; }
  37. };
  38.  
  39. //Фабричныйметод
  40. Shape* Shape::createShape(char cd)
  41. {
  42. 	Shape* sh = 0;
  43. 	switch (cd)
  44. 	{
  45. 	case 'T':
  46. 		sh = new Triangle(); break;
  47. 	case 'R':
  48. 		sh = new Rectangle(); break;
  49. 	case 'O':
  50. 		sh = new Octagon(); break;
  51. 	default: break;
  52. 	}
  53. 	return sh;
  54. }
  55.  
  56. int main()
  57. {
  58. 	setlocale(LC_ALL, "Russian");
  59. 	Shape* p1 = 0;
  60. 	char T;
  61. 	cout << "Тип?  ";
  62. 	cin >> T;
  63. 	p1 = Shape::createShape(T);
  64. 	if (!p1) return 0; p1->info();
  65. 	p1->getArea();
  66. 	delete p1;
  67. 	return 0;
  68. }
Success #stdin #stdout 0s 4364KB
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Тип?
https://ideone.com/b7pssu
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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