Compilare: user.cpp: In function ‘int main()’: user.cpp:108:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int k = 0 ; k < tip.size() ; ++k ){ ~~^~~~~~~~~~~~ user.cpp:99:10: warning: ‘dorit’ may be used uninitialized in this function [-Wmaybe-uninitialized] char dorit; ^~~~~ user.cpp:139:36: warning: ‘fj’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << fi << " " << fj << "\n"; ^~~~ user.cpp:139:23: warning: ‘fi’ may be used uninitialized in this function [-Wmaybe-uninitialized] fout << fi << " " << fj << "\n"; ^~~