Compilare: user.cpp: In function ‘void split()’: user.cpp:15:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size()-1;i++) ^ user.cpp: In function ‘int verif(std::string)’: user.cpp:29:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<act.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:58:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<strr.size()) ^ user.cpp:61:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(strr[j]!='=' && j<strr.size()) ^ user.cpp:66:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j<strr.size()) ^