Compilare: user.cpp: In function ‘int main()’: user.cpp:17:9: warning: unused variable ‘n’ [-Wunused-variable] int n,x,cnt=0,a,b; ^ user.cpp:17:11: warning: unused variable ‘x’ [-Wunused-variable] int n,x,cnt=0,a,b; ^ user.cpp:17:13: warning: unused variable ‘cnt’ [-Wunused-variable] int n,x,cnt=0,a,b; ^