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  1. #include <vector>
  2.  
  3. template <typename T>
  4. class matrix 
  5. {
  6.   std::size_t    mRowdim, mColdim;
  7.   std::vector<T> mValues;
  8.  
  9. public:
  10.   matrix(std::size_t rowdim, std::size_t coldim) 
  11.     : mRowdim(rowdim), mColdim(coldim), mValues(rowdim*coldim) {} // rowdim x coldim matrix 
  12.  
  13.   matrix(const matrix& other) 
  14.     : mRowdim(other.mRowdim), mColdim(other.mColdim), mValues(other.mValues) {} // copy ctor
  15.  
  16.   matrix(matrix&& other) 
  17.     : mRowdim(other.mRowdim), mColdim(other.mColdim), mValues(std::move(other.mValues)) {} // move ctor
  18.  
  19.   matrix &operator= (const matrix &other) // copy operator
  20.   {
  21.     matrix other_cpy(other);
  22.     other_cpy.swap(*this);
  23.     return *this;
  24.   }
  25.  
  26.   matrix &operator= (matrix &&other) // move operator
  27.   {
  28.      other.swap(*this);
  29.      return *this;
  30.   }
  31.  
  32.   void swap(matrix &other) // swaperator
  33.   { 
  34.     std::swap(mRowdim, other.mRowdim);
  35.     std::swap(mColdim, other.mColdim);
  36.     mValues.swap(other.mValues); 
  37.   }
  38.  
  39.   T &operator() (std::size_t row, std::size_t col)
  40.   {
  41.     return mValues[mColdim*row + col];
  42.   } 
  43.  
  44.   const T &operator() (std::size_t row, std::size_t col) const
  45.   { 
  46.     // ... range check ...
  47.     return mValues[mColdim*row + col];
  48.   } 
  49. };
  50.  
  51. int main()
  52. {
  53.   matrix<double> my_matrix(10,10);
  54.  
  55.   return 0;
  56. }
Success #stdin #stdout 0s 3012KB
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https://ideone.com/bvFc0B
language:
C++14 (gcc 8.3)
created:
13 years ago
visibility:
public

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