Compilare: user.cpp: In function ‘int main()’: user.cpp:20:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz!=string::npos && rez.size()<=1000) ^ user.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<rez.size()&&i<=1000;i++) ^