Compilare: user.c:10:9: warning: return type of ‘main’ is not ‘int’ [-Wmain] int64_t main(void) ^ user.c: In function ‘main’: user.c:17:3: warning: format ‘%u’ expects argument of type ‘unsigned int *’, but argument 3 has type ‘uint64_t *’ [-Wformat=] fscanf(in, "%u%*c", &t); ^ user.c:17:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u%*c", &t); ^ user.c:21:10: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld%*c%lld%*c%lld%*c", &a, &b, &c); ^