Compilare: user.cpp: In function ‘int findi(char)’: user.cpp:11:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<delim.size();i++) ^ user.cpp: In function ‘int verificare(std::string)’: user.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ^ user.cpp: In function ‘std::vector<std::basic_string<char> > split(std::string)’: user.cpp:48:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:69:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ret.size();i++) ^