Eroare de compilare: main.cpp: In member function 'void Graph::dfs(int)': main.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int i = 0; i < adj[root].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graph::dfs_comp_conexe(int)': main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int i = 0; i < adj[root].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Graph::comp_conexe()': main.cpp:66:9: error: no match for 'operator<<' (operand types are 'std::ifstream' {aka 'std::basic_ifstream<char>'} and 'int') 66 | fout<<no_comp_conexe<<"\n"; | ~~~~^~~~~~~~~~~~~~~~ | | | | | int | std::ifstream {aka std::basic_ifstream<char>} main.cpp:66:9: note: candidate: 'operator<<(int, int)' (built-in) 66 | fout<<no_comp_conexe<<"\n"; | ~~~~^~~~~~~~~~~~~~~~ main.cpp:66:9: note: no known conversion for argument 1 from 'std::ifstream' {aka 'std::basic_ifstream<char>'} to 'int' In file included from /usr/include/c++/10/string:55, from /usr/include/c++/10/bits/locale_classes.h:40, from /usr/include/c++/10/bits/ios_base.h:41, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/ostream:38, from /usr/include/c++/10/iostream:39, from main.cpp:1: /usr/include/c++/10/bits/basic_string.h:6468:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)' 6468 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/10/bits/basic_string.h:6468:5: note: template argument deduction/substitution failed: main.cpp:66:11: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 66 | fout<<no_comp_conexe<<"\n"; | ^~~~~~~~~~~~~~ In file included from /usr/include/c++/10/bits/ios_base.h:46, from /usr/include/c++/10/ios:42, from /usr/include/c++/10/ostream:38, from /usr/include/c++/10/iostream:39, from main.cpp:1: /usr/include/c++/10/system_error:262:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)' 262 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ /usr/include/c++/10/system_error:262:5: note: template argument deduction/substitution failed: main.cpp:66:11: note: 'std::ifstream' {aka 'std::basic_ifstream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>' 66 | fout<<no_comp_conexe<<"\n"; | ^~~~~~~~~~~~~~ In file included from /usr/include/c++/10/iostream:39, from main.cpp:1: /usr/include/c++/10/ostream:506:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)' 506 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) | ^~~~~~~~ Non zero exit status: 1