Compilare: user.c: In function ‘main’: user.c:154:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d%d%d", &n, &m, &z, &a, &b); ^ user.c:179:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &q1, &q2, &q3); ^