Compilare: user.c:2:6: warning: return type of ‘main’ is not ‘int’ [-Wmain] void main() ^ user.c: In function ‘main’: user.c:4:12: warning: unused variable ‘x’ [-Wunused-variable] int a, n, x; ^ user.c:6:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a); ^ user.c:8:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^