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  1. #include <iostream>
  2. #include <fstream>
  3.  
  4. using namespace std;
  5.  
  6. const size_t SIZE =4;
  7.  
  8. template<typename T>
  9. class Matrix;
  10.  
  11. template< typename T>
  12. ostream & operator<< (ostream &, const Matrix<T> &);
  13.  
  14. template< typename T>
  15. istream& operator >> (istream &, Matrix<T> &);
  16.  
  17. template<typename T>
  18. class Matrix
  19. {
  20. private:
  21.     T arr[SIZE][SIZE];
  22.     friend  ostream& operator << <> (ostream &, const Matrix &);
  23.     friend  istream& operator >> <> (istream &, Matrix &);
  24.     void initialize();// функция которая заполняет матрицу как единичную
  25.  
  26. public:
  27.     Matrix() {}
  28.     Matrix(const Matrix<T>&);
  29.     const Matrix& operator=(const Matrix<T>&);
  30.     const Matrix& operator*(const Matrix<T>&);
  31.     void  operator*=(const Matrix<T> &);
  32.     T* operator[](int row);
  33. };
  34.  
  35. template< typename T>
  36. ostream & operator<<(ostream & os, const Matrix<T> & rhs)
  37. {
  38.     for (int i(0); i < SIZE; ++i)
  39.     {
  40.         for (int j(0); j < SIZE; ++j)
  41.         {
  42.             os << rhs.arr[i][j] << ' ';
  43.         }
  44.         os << endl;
  45.     }
  46.     return os;
  47. }
  48.  
  49. template< typename T>
  50. istream & operator>>(istream&  is, Matrix<T> & rhs)
  51. {
  52.     for (int i(0); i < SIZE; ++i)
  53.     {
  54.         for (int j(0); j < SIZE; ++j)
  55.         {
  56.             is >> rhs.arr[i][j];
  57.         }
  58.     }
  59.     return is;
  60. }
  61.  
  62. int main()
  63. {
  64. 	Matrix <int> m;
  65. 	ifstream("input.txt") >> m;
  66.  
  67. 	return 0;
  68. }
Success #stdin #stdout 0s 3452KB
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/LbBd5U
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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