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  1. #include <iostream>
  2. #include <string>
  3. #include <vector>
  4.  
  5. using namespace std;
  6.  
  7. class Shape {
  8. private:
  9. 	float width, height;
  10. public:
  11. 	Shape(float width = 0, float height = 0) {
  12. 		this->width = width;
  13. 		this->height = height;
  14. 	}
  15. 	friend ostream &operator<< (ostream &os, Shape &s) {
  16. 		os << s.width << " x " << s.height;
  17.  
  18. 		return os;
  19. 	}
  20. 	float getWidth() {
  21. 		return width;
  22. 	}
  23. 	float getHeight() {
  24. 		return height;
  25. 	}
  26. };
  27. class Triangle: public Shape {
  28. private:
  29. public:
  30. 	Triangle(float width = 0, float height = 0):Shape(width, height) {
  31. 	}
  32. 	float area() {
  33. 		return 0.5 * getWidth() * getHeight();
  34. 	}
  35. };
  36. class Rectangle: public Shape {
  37. private:
  38. public:
  39. 	Rectangle(float width = 0, float height = 0):Shape(width, height) {
  40. 	}
  41. 	float area() {
  42. 		return getWidth() * getHeight();
  43. 	}
  44. };
  45.  
  46. int main () {
  47. 	Triangle tamgiac(4,3);
  48. 	Rectangle chunhat(5,6);
  49.  
  50. 	cout << "> Tam giac kich thuoc " << tamgiac << ". Co dien tich " << tamgiac.area();
  51. 	cout << "\n> Hinh chu nhat kich thuoc " << chunhat << ". Co dien tich " << chunhat.area();
  52.  
  53. 	return 0;
  54. }
Success #stdin #stdout 0.01s 5392KB
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stdin
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Standard input is empty
stdout
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> Tam giac kich thuoc 4 x 3. Co dien tich 6
> Hinh chu nhat kich thuoc 5 x 6. Co dien tich 30
https://ideone.com/GwzJbZ
BTH 3.2.b
language:
C++14 (clang 8.0)
created:
2 years ago
visibility:
public

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