Compilare: user.cpp: In function ‘int main()’: user.cpp:9:21: warning: unused variable ‘x’ [-Wunused-variable] {unsigned long long x,a,b,i,s=0; ^ user.cpp:9:23: warning: unused variable ‘a’ [-Wunused-variable] {unsigned long long x,a,b,i,s=0; ^ user.cpp:9:25: warning: unused variable ‘b’ [-Wunused-variable] {unsigned long long x,a,b,i,s=0; ^ user.cpp:9:27: warning: unused variable ‘i’ [-Wunused-variable] {unsigned long long x,a,b,i,s=0; ^ user.cpp:9:29: warning: unused variable ‘s’ [-Wunused-variable] {unsigned long long x,a,b,i,s=0; ^