Compilare: user.cpp: In function ‘int main()’: user.cpp:21:15: warning: unused variable ‘n’ [-Wunused-variable] int a = 1,n,s,d; ^ user.cpp:21:17: warning: unused variable ‘s’ [-Wunused-variable] int a = 1,n,s,d; ^ user.cpp:21:19: warning: unused variable ‘d’ [-Wunused-variable] int a = 1,n,s,d; ^