Compilare: user.cpp: In function ‘int Simil(std::string*, std::string*)’: user.cpp:13:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < c1->length(); i++) ^ user.cpp:15:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < c2->length(); i++) ^ user.cpp:17:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < c1->length(); i++) ^ user.cpp:19:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < c2->length(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:59:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = sor.front()+1; j < v.size(); j++) ^