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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. class MyMatrix
  5. {
  6. public:
  7.     MyMatrix(int m, int n) :
  8.         m_matrix(m, std::vector<int>(n))
  9.     {
  10.     }
  11.     // Other methods
  12.  
  13.     const std::vector<int>& operator[] (int m) const { return m_matrix.at(m); }
  14.     std::vector<int>& operator[] (int m) { return m_matrix.at(m); }
  15.  
  16.     int operator () (int m, int n) const { return m_matrix.at(m).at(n); }
  17.     int& operator () (int m, int n) { return m_matrix.at(m).at(n); }
  18.  
  19. private:
  20.     std::vector<std::vector<int>> m_matrix;
  21. };
  22.  
  23.  
  24. int main()
  25. {
  26.     MyMatrix m(4, 2);
  27.  
  28.     for (int i = 0; i != 4; ++i) {
  29.         for (int j = 0; j != 2; ++j) {
  30.             m[i][j] = 10 * i + j;
  31.         }
  32.     }
  33.  
  34.     for (int i = 0; i != 4; ++i) {
  35.         for (int j = 0; j != 2; ++j) {
  36.             std::cout << m(i, j) << " ";
  37.         }
  38.         std::cout << std::endl;
  39.     }
  40. }
  41.  
Success #stdin #stdout 0s 3432KB
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https://ideone.com/ZMD4cg
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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