Compilare: user.cpp: In member function ‘long int THash::Search(int)’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long i=0;i<m_vHash[k].size();i++) ^ user.cpp:33:11: warning: converting to non-pointer type ‘long int’ from NULL [-Wconversion-null] return NULL; ^ user.cpp: In member function ‘void THash::Add(int)’: user.cpp:45:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (long i=0; i<m_vHash[k].size(); i++) ^ user.cpp: In member function ‘void THash::Delete(int)’: user.cpp:58:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( long i=0; i<m_vHash[k].size();i++) ^ user.cpp: In function ‘void ReadData()’: user.cpp:107:57: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=] fprintf(fOut,"%d\n",objHash->Search(iNumber)); ^