void input(LIST &l)
{
	int n;
	printf("\nNhap so luong node: ");
	scanf("%d", &n);
	init(l);
	for(int i = 1; i <= n; i++)
	{
		KieuDuLieu x;
		nhap(x);
		NODE* p = getnode(x);
		addHead(l, p);
	}
}

Line 1: error: expected ')' before '&' token