Compilare: user.cpp: In function ‘int main()’: user.cpp:19:13: warning: variable ‘d’ set but not used [-Wunused-but-set-variable] int d,nr,prod,j; ^ user.cpp:19:18: warning: variable ‘prod’ set but not used [-Wunused-but-set-variable] int d,nr,prod,j; ^ user.cpp:14:15: warning: unused variable ‘a’ [-Wunused-variable] int n,x,y,a,b; ^ user.cpp:14:17: warning: unused variable ‘b’ [-Wunused-variable] int n,x,y,a,b; ^