Compilare: user.cpp: In function ‘int main()’: user.cpp:99:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < col.size(); k++) { ~~^~~~~~~~~~~~ user.cpp:95:10: warning: ‘culoare’ may be used uninitialized in this function [-Wmaybe-uninitialized] char culoare; ^~~~~~~ user.cpp:129:52: warning: ‘coloana’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << linie << " " << coloana << '\n' << culoare; ^~~~~~~ user.cpp:129:26: warning: ‘linie’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << linie << " " << coloana << '\n' << culoare; ^~~