Compilare: user.c: In function ‘main’: user.c:11:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld %lld %lld", &n, &m, &l); ^ user.c:13:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld %lld", &pi, &li); ^ user.c:16:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld", &d); ^