Compilare: user.c: In function ‘main’: user.c:18:9: warning: format ‘%lu’ expects argument of type ‘long unsigned int *’, but argument 3 has type ‘long long int *’ [-Wformat=] fscanf(f,"%lu ",&v[i]); ^ user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u %u %u ",&n,&a,&b); ^ user.c:18:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lu ",&v[i]); ^