Compilare: user.c: In function ‘main’: user.c:8:6: warning: unused variable ‘i’ [-Wunused-variable] int i, j, T; ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &T); ^ user.c:15:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lu", &N); ^