fork download 
  1. #include <iostream>
  2.  
  3. class Coord
  4. {
  5. private:
  6. 	double x, y, z;
  7.  
  8. public:
  9. 	Coord();
  10. 	Coord(double, double, double);
  11.  
  12. 	class setters {
  13. 		friend class Coord;
  14.  
  15. 	private:
  16. 		explicit setters(Coord &);
  17.  
  18. 	public:
  19. 		setters(setters const &) = delete;
  20. 		setters & operator=(setters const &) = delete;
  21.  
  22. 		void x(double) const;
  23. 		void y(double) const;
  24. 		void z(double) const;
  25.  
  26. 	private:
  27. 		Coord & coord;
  28. 	};
  29. 	friend class setters;
  30.  
  31. 	class getters {
  32. 		friend class Coord;
  33.  
  34. 	private:
  35. 		explicit getters(Coord const &);
  36.  
  37. 	public:
  38. 		getters(getters const &) = delete;
  39. 		getters & operator=(getters const &) = delete;
  40.  
  41. 		double x() const;
  42. 		double y() const;
  43. 		double z() const;
  44.  
  45. 	private:
  46. 		Coord const & coord;
  47. 	};
  48. 	friend class getters;
  49.  
  50. 	setters const set;
  51. 	getters const get;
  52. };
  53.  
  54. Coord::Coord() : x(0), y(0), z(0), set(*this), get(*this) { }
  55.  
  56. Coord::Coord(double px, double py, double pz) : x(px), y(py), z(pz), set(*this), get(*this) { }
  57.  
  58. Coord::setters::setters(Coord & c) : coord(c) { }
  59.  
  60. void Coord::setters::x(double px) const {
  61. 	coord.x = px;
  62. }
  63.  
  64. void Coord::setters::y(double py) const {
  65. 	coord.y = py;
  66. }
  67.  
  68. void Coord::setters::z(double pz) const {
  69. 	coord.z = pz;
  70. }
  71.  
  72. Coord::getters::getters(Coord const & c) : coord(c) { }
  73.  
  74. double Coord::getters::x() const {
  75. 	return coord.x;
  76. }
  77.  
  78. double Coord::getters::y() const {
  79. 	return coord.y;
  80. }
  81.  
  82. double Coord::getters::z() const {
  83. 	return coord.z;
  84. }
  85.  
  86. int main() {
  87. 	Coord a(1,2,3);
  88.  
  89. 	std::cout << a.get.x() << ' ' << a.get.y() << ' ' << a.get.z() << std::endl;
  90.  
  91. 	a.set.x(5);
  92. 	a.set.y(6);
  93. 	a.set.z(7);
  94.  
  95. 	std::cout << a.get.x() << ' ' << a.get.y() << ' ' << a.get.z() << std::endl;
  96.  
  97. 	return 0;
  98. }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin 
Standard input is empty
stdout 
1 2 3
5 6 7
https://ideone.com/9v5ZYj
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!