Compilare: user.c: In function ‘greater_elem’: user.c:21:28: warning: value computed is not used [-Wunused-value] A[i] == *val && !used[i] && (eq = 1, eq_pos = i); ^ user.c:22:24: warning: value computed is not used [-Wunused-value] !used[i] && !min_pos && (min_pos = i); ^ user.c: In function ‘main’: user.c:43:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cal.out", "w", stdout); ^ user.c:48:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.c:51:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.c:54:33: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= N; ++i) scanf("%d", &A[i]); ^ user.c:55:33: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for (i = 1; i <= N; ++i) scanf("%d", &B[i]); ^