Compilare: user.c: In function ‘main’: user.c:18:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u %u\n", &n, &m); ^ user.c:20:32: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] for (i = 0; i < n; ++i) fscanf(in, "%u", &v[i]); ^ user.c:24:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u", &a); ^ user.c:30:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u %u", &a, &b); ^ user.c:37:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u %u", &a, &b); ^ user.c:48:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u", &a); ^