Compilare: user.cpp: In function ‘bool subsir(std::string, std::string)’: user.cpp:12:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int ii=0; ii<b.size(); ii++) ^ user.cpp:15:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz==string::npos) return false; ^ user.cpp: In function ‘int main()’: user.cpp:30:14: warning: statement has no effect [-Wunused-value] for(n; n>0; n--) ^ user.cpp:39:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(x.size()>maxL) ^ user.cpp:44:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(x.size()==maxL && x.compare(maxchar)==-1) ^