void lista_cartella(DIR *directory){
	struct dirent *dent;
	dent=readdir(directory);
	fprintf(output,"Elenco file contenuti nella directory:\n");
	while(dent!=NULL){
		if(strcmp(".",dent->d_name)!=0 && strcmp("..",dent->d_name)!=0 
		&& strcmp(".DS_Store",dent->d_name)!=0)
			fprintf(output,"%s\n",dent->d_name);
		dent=readdir(directory);
	}
	fprintf(output,"------------------------------------------------\n");
}