Compilare: main.cpp: In function 'int main()': main.cpp:13:20: warning: unused variable 'j' [-Wunused-variable] int n,i,posmax,j,st,dr; ^ main.cpp:36:11: warning: 'posmax' may be used uninitialized in this function [-Wmaybe-uninitialized] for (i=posmax-1;i>1;i--) ~^~~~~~~~~ main.cpp:51:32: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<sum<<'\n'<<st<<" "<<dr; ^ main.cpp:51:25: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] out<<sum<<'\n'<<st<<" "<<dr; ^~~