Compilare: main.cpp:60:5: warning: "/*" within comment [-Wcomment] /*for (auto itr = lowered_users.begin();itr!=lowered_users.end();itr++) main.cpp: In function 'void search_user(std::map<std::__cxx11::basic_string<char>, int>, std::map<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >, std::__cxx11::string)': main.cpp:13:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i<=username.length(); i++) ~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < user.length();i++) ~~^~~~~~~~~~~~~~~