Compilare: user.cpp: In function ‘int main()’: user.cpp:9:20: warning: unused variable ‘ib’ [-Wunused-variable] int x,n,s=N,ia,ib,ss=0,ias,ibs,i; ^ user.cpp:28:29: warning: ‘ibs’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<ss<<' '<<ias<<' '<<ibs<<'\n'; ^ user.cpp:28:19: warning: ‘ias’ may be used uninitialized in this function [-Wmaybe-uninitialized] out<<ss<<' '<<ias<<' '<<ibs<<'\n'; ^