Compilare: user.cpp: In static member function ‘static Matrix Matrix::add(Matrix, Matrix)’: user.cpp:29: warning: no return statement in function returning non-void user.cpp: In function ‘int main(int, char**)’: user.cpp:70: warning: ‘a.Matrix::data[1u][1u]’ may be used uninitialized in this function user.cpp:70: warning: ‘a.Matrix::data[1u][0u]’ may be used uninitialized in this function