Compilare: user.cpp: In function ‘int comparare(std::string, std::string)’: user.cpp:15:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<a.size()) ^ user.cpp:22:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==b.size()-1) ^ user.cpp: In function ‘int main()’: user.cpp:39:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s.size()>mx) ^ user.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(s.size()==mx && s<rsp) ^