Compilare: user.cpp: In function ‘int main()’: user.cpp:6:15: warning: unused variable ‘i’ [-Wunused-variable] int x, n, i, ok; ^ user.cpp:6:18: warning: unused variable ‘ok’ [-Wunused-variable] int x, n, i, ok; ^ user.cpp:8:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&n); ^