Compilare: user.c: In function ‘main’: user.c:12:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld", &t); ^ user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld%lld", &n, &m); ^ user.c:16:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld%lld%lld%lld%lld", &xk1[i], &yk1[i], &xk2[i], &yk2[i], &c[i]); ^