Compilare: user.cpp: In member function 'void Matrix::fromVector(std::vector<long long int, std::allocator<long long int> >)': user.cpp:21: warning: comparison between signed and unsigned integer expressions user.cpp:23: warning: comparison between signed and unsigned integer expressions user.cpp: In member function 'bool Matrix::operator=(Matrix)': user.cpp:37: warning: no return statement in function returning non-void user.cpp: In member function 'void Matrix::print()': user.cpp:67: warning: format '%d' expects type 'int', but argument 2 has type 'long long int' user.cpp: In member function 'bool Matrix::operator=(Matrix)': user.cpp:37: warning: control reaches end of non-void function