View Compilation Error

0_0_39554243_20363.cpp: In member function 'Matrix Matrix::operator+(Matrix)':
0_0_39554243_20363.cpp:23:38: error: 'n' was not declared in this scope
   23 |                 for (int i = 1; i <= n; ++i)
      |                                      ^
0_0_39554243_20363.cpp: In member function 'Matrix Matrix::operator*(Matrix)':
0_0_39554243_20363.cpp:31:38: error: 'n' was not declared in this scope
   31 |                 for (int i = 1; i <= n; ++i)
      |                                      ^
0_0_39554243_20363.cpp: In member function 'Matrix Matrix::operator^(ll)':
0_0_39554243_20363.cpp:40:38: error: 'n' was not declared in this scope
   40 |                 for (int i = 1; i <= n; ++i)
      |                                      ^