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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. private:
  12.     T arr[SIZE][SIZE];
  13.     template <typename T1> friend  ostream& operator << (ostream &, const Matrix<T1> &);
  14.     template <typename T1> friend  istream& operator >> (istream &, Matrix<T1> &);
  15.     void initialize();// функция которая заполняет матрицу как единичную
  16.  
  17. public:
  18.     Matrix() {}
  19.     Matrix(const Matrix<T>&);
  20.     const Matrix& operator=(const Matrix<T>&);
  21.     const Matrix& operator*(const Matrix<T>&);
  22.     void  operator*=(const Matrix<T> &);
  23.     T* operator[](int row);
  24. };
  25.  
  26. template< typename T>
  27. ostream & operator<<(ostream & os, const Matrix<T> & rhs)
  28. {
  29.     for (int i(0); i < SIZE; ++i)
  30.     {
  31.         for (int j(0); j < SIZE; ++j)
  32.         {
  33.             os << rhs.arr[i][j] << ' ';
  34.         }
  35.         os << endl;
  36.     }
  37.     return os;
  38. }
  39.  
  40. template< typename T>
  41. istream & operator>>(istream&  is, Matrix<T> & rhs)
  42. {
  43.     for (int i(0); i < SIZE; ++i)
  44.     {
  45.         for (int j(0); j < SIZE; ++j)
  46.         {
  47.             is >> rhs.arr[i][j];
  48.         }
  49.     }
  50.     return is;
  51. }
  52.  
  53. int main()
  54. {
  55. 	Matrix <int> m;
  56. 	ifstream("input.txt") >> m;
  57.  
  58. 	return 0;
  59. }
Success #stdin #stdout 0s 3408KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
https://ideone.com/fd6jzV
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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