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  1. #include <iostream>
  2. #include <vector>
  3. #include <string> 
  4. #include <utility>
  5.  
  6. class Matrix {
  7. 	std::string **m;
  8. 	int m_x, m_y;
  9. public:
  10. 	Matrix(int x = 0, int y = 0) : m_x(x), m_y(y) {
  11. 		m = new std::string*[x];
  12. 		for (int i = 0; i < x; ++i)
  13. 			m[i] = new std::string[y];
  14. 	}
  15.  
  16. 	Matrix(const Matrix &src) : m_x(src.m_x), m_y(src.m_y) {
  17. 		m = new std::string*[m_x];
  18. 		for (int i = 0; i < m_x; ++i) {
  19. 			m[i] = new std::string[m_y];
  20. 			for (int j = 0; j < m_y; ++j) {
  21. 				m[i][j] = src.m[i][j];
  22. 			}
  23. 		}
  24. 	}
  25.  
  26. 	~Matrix() {
  27. 		for (int i = 0; i < m_x; ++i)
  28. 			delete[] m[i];
  29. 		delete[] m;
  30. 	}
  31.  
  32. 	Matrix& operator=(const Matrix &rhs) {
  33. 		if (&rhs != this) {
  34. 			Matrix temp(rhs);
  35. 			std::swap(m, temp.m);
  36. 			std::swap(m_x, temp.m_x);
  37. 			std::swap(m_y, temp.m_y);
  38. 		}
  39. 		return *this;
  40. 	}
  41.  
  42. 	void print() const {
  43. 		for(int i = 0; i < m_x; ++i) {
  44. 			for (int j = 0; j < m_y; ++j) {
  45. 				std::cout << '[' << m[i][j] << ']';
  46. 			}
  47. 			std::cout << std::endl;
  48. 		}
  49. 	}
  50.  
  51. 	class Proxy {
  52. 		std::string *mm;
  53. 	public:
  54. 		Proxy(std::string *s) : mm(s) {}
  55.  
  56. 		std::string& operator[](int index) {
  57. 			return mm[index];
  58. 		}
  59. 	};
  60.  
  61. 	Proxy operator[](int index) {
  62. 		return Proxy(m[index]);
  63. 	}
  64. };
  65.  
  66. int main()
  67. {
  68. 	Matrix m(5, 5);
  69. 	m.print();
  70. 	std::cout << std::endl;
  71.  
  72. 	m[2][2] = "It Works";
  73. 	std::cout << m[2][2] << std::endl;
  74. 	m.print();
  75. 	std::cout << std::endl;
  76.  
  77. 	Matrix m2(m);
  78. 	std::cout << m2[2][2] << std::endl;
  79. 	m2.print();
  80. 	std::cout << std::endl;
  81.  
  82. 	Matrix m3;
  83. 	m3 = m2;
  84. 	std::cout << m3[2][2] << std::endl;
  85. 	m3.print();
  86.  
  87. 	return 0;
  88. }
Success #stdin #stdout 0s 5596KB
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Standard input is empty
stdout
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[][][][][]
[][][][][]
[][][][][]
[][][][][]
[][][][][]

It Works
[][][][][]
[][][][][]
[][][It Works][][]
[][][][][]
[][][][][]

It Works
[][][][][]
[][][][][]
[][][It Works][][]
[][][][][]
[][][][][]

It Works
[][][][][]
[][][][][]
[][][It Works][][]
[][][][][]
[][][][][]
https://ideone.com/HkBaF7
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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