Compilare: user.c: In function ‘main’: user.c:13:1: warning: format ‘%lld’ expects argument of type ‘long long int *’, but argument 3 has type ‘int *’ [-Wformat=] fscanf(file1, "%lld", &N); ^ user.c:15:8: warning: unused variable ‘n’ [-Wunused-variable] double n = (float)N; ^ user.c:13:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%lld", &N); ^