Compilare: user.c: In function ‘main’: user.c:7:17: warning: unused variable ‘j’ [-Wunused-variable] short n,i,o,j; ^ user.c:7:15: warning: unused variable ‘o’ [-Wunused-variable] short n,i,o,j; ^ user.c:7:13: warning: unused variable ‘i’ [-Wunused-variable] short n,i,o,j; ^ user.c:8:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nunta.in","r",stdin); ^ user.c:9:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("nunta.out","w",stdout); ^ user.c:10:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%hd",&n); ^