Compilare: user.c: In function ‘main’: user.c:36:11: warning: unused variable ‘out’ [-Wunused-variable] FILE *out = freopen("algsort.out", "w", stdout); ^ user.c:35:11: warning: unused variable ‘in’ [-Wunused-variable] FILE *in = freopen("algsort.in", "r", stdin); ^ user.c:40:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.c:43:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &v[i]); ^