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  1. #include <iostream>
  2. #include <algorithm>
  3. #include <vector>
  4. #include <cstdlib>
  5.  
  6. template<class T>
  7. class mat
  8. {
  9.     unsigned int nrows, ncols;
  10.     std::vector< T > data;
  11.  
  12. public:
  13.     mat(unsigned int rows, unsigned int cols)
  14.         : nrows(rows), ncols(cols)
  15.         , data(rows * cols)
  16.     {
  17.     }
  18.  
  19.     T* operator[](unsigned int row)
  20.     {
  21.         return &data.at(row * ncols);
  22.     }
  23.  
  24.     const T* operator[](unsigned int row) const
  25.     {
  26.         return &data.at(row * ncols);
  27.     }
  28. };
  29.  
  30. int main()
  31. {
  32.     mat<int> imat(50,50);
  33.     mat<float> fmat(30,40);
  34.  
  35.     imat[10][20] = 10;
  36.     fmat[0][39] = 100.0;
  37.  
  38.     return EXIT_SUCCESS;
  39. }
  40.  
Success #stdin #stdout 0s 3468KB
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https://ideone.com/nYEa6W
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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