Compilare: user.cpp: In function ‘int main()’: user.cpp:40:11: warning: unused variable ‘aaaa’ [-Wunused-variable] int aaaa = 5; ^ user.cpp:36:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:43:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^