else {
		uid_t id= getuid();
		gid_t gid = getgid();
		struct passwd* user = getpwuid(id);
		string name = user -> pw_name;
		struct group* groups = getgrgid(gid);
		string name_1 = groups -> gr_name;
		if (strcmp(argv[1], "-u") == 0)
			cout << id;
		if (strcmp(argv[1], "-g") == 0)
			cout << groups -> gr_name;
		if (strcmp(argv[1], "-G") == 0)
			do{
				gid = groups -> gr_gid;
				for (int i = 0; *(groups->gr_mem) != 0; i++, (groups -> gr_mem)++)
					if (strcmp(*(groups->gr_mem), user->pw_name) == 0)
						cout << gid << " ";

				groups = getgrent();
			} while (groups != NULL);