Compilare: user.c: In function ‘main’: user.c:158:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rsp.in", "r", stdin); ^ user.c:159:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rsp.out", "w", stdout); ^ user.c:161:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &T); ^ user.c:165:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(S + 1, NMAX - 2, stdin); ^