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  1. #include <iostream>
  2. #include <vector>
  3. #include <string> 
  4.  
  5. class Matrix {
  6. 	std::vector<std::vector<std::string>> m;
  7. public:
  8. 	Matrix(int x = 0, int y = 0) {
  9. 		m.resize(x);
  10. 		for (int i = 0; i < x; ++i)
  11. 			m[i].resize(y);
  12. 	}
  13.  
  14. 	void print() const {
  15. 		for(size_t i = 0; i < m.size(); ++i) {
  16. 			for (size_t j = 0; j < m[i].size(); ++j) {
  17. 				std::cout << '[' << m[i][j] << ']';
  18. 			}
  19. 			std::cout << std::endl;
  20. 		}
  21. 	}
  22.  
  23. 	class Proxy {
  24. 		std::vector<std::string> &mm;
  25. 	public:
  26. 		Proxy(std::vector<std::string> &s) : mm(s) {}
  27.  
  28. 		std::string& operator[](int index) {
  29. 			return mm[index];
  30. 		}
  31. 	};
  32.  
  33. 	Proxy operator[](int index) {
  34. 		return Proxy(m[index]);
  35. 	}
  36. };
  37.  
  38. int main()
  39. {
  40. 	Matrix m(5, 5);
  41. 	m.print();
  42. 	std::cout << std::endl;
  43.  
  44. 	m[2][2] = "It Works";
  45. 	std::cout << m[2][2] << std::endl;
  46. 	m.print();
  47. 	std::cout << std::endl;
  48.  
  49. 	Matrix m2(m);
  50. 	std::cout << m2[2][2] << std::endl;
  51. 	m2.print();
  52. 	std::cout << std::endl;
  53.  
  54. 	Matrix m3;
  55. 	m3 = m2;
  56. 	std::cout << m3[2][2] << std::endl;
  57. 	m3.print();
  58.  
  59. 	return 0;
  60. }
Success #stdin #stdout 0.01s 5540KB
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stdin
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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/KU1cDx
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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