Compilare: user.c: In function ‘main’: user.c:27:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.c:26:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1, "%d", &n); ^ user.c:30:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1, "%lld", &v[i]); ^