Compilare: user.cpp: In function ‘int main()’: user.cpp:15:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(w>0&&i<s.length()){ ^ user.cpp:26:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<s.length()){ ^ user.cpp:27:7: warning: unused variable ‘j’ [-Wunused-variable] int j=i; ^ user.cpp:38:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(!u){for(int i=0;i<rez.length()-k;i++)cout<<rez[i];cout<<"...";} ^