Compilare: user.cpp:15:10: warning: ‘typedef’ was ignored in this declaration [enabled by default] }; ^ user.cpp: In function ‘void insert(std::string, int)’: user.cpp:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<p.length(); ++i) ^ user.cpp: In function ‘void buildup()’: user.cpp:66:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<aux->c.size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:88:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<text.length(); ++i) { ^