public static Double Tinh_gia_tri(ArrayList P, Double x0)
{
Double kq = 0;
foreach (DON_THUC q in P)
{
kq = kq + XL_DON_THUC.Tinh_gia_tri(q, x0);
}
return(kq);
}
public static void Main(string[] args)
{
DON_THUC P;
DON_THUC Q;
P = XL_DON_THUC.Nhap("Nhap don thuc P(x):\n");
Q = XL_DON_THUC.Dao_ham(P);
String Chuoi = "Dao ham cua P(x)=";
Chuoi = Chuoi + XL_DON_THUC.Chuoi(P) + "\n";
Chuoi = Chuoi + " la Q(x)=" + XL_DON_THUC.Chuoi(Q);
XL_CHUOI.Xuat(Chuoi);
}
public static ArrayList Nhap(String Ghi_Chu)
{
ArrayList kq = new ArrayList();
long n;
XL_CHUOI.Xuat(Ghi_Chu);
n = XL_SO_NGUYEN.Nhap("Da thuc co bao nhieu don thuc:");
DON_THUC p;
for (int i = 0; i < n; i++)
{
p = XL_DON_THUC.Nhap();
kq.Add(p);
}
return(kq);
}
public static String Chuoi(ArrayList P)
{
String kq = "";
int i = 0;
foreach (DON_THUC q in P)
{
kq = kq + XL_DON_THUC.Chuoi(q);
if (i < P.Count - 1)
{
kq = kq + "+";
}
i++;
}
return(kq);
}
public static void Main(string[] args)
{
DON_THUC P;
Double x0;
Double kq;
P = XL_DON_THUC.Nhap("Nhap don thuc:\n");
x0 = XL_SO_THUC.Nhap("Gia tri x0 = ");
kq = XL_DON_THUC.Tinh_gia_tri(P, x0);
String Chuoi = "Gia tri cua don thuc P(x)=";
Chuoi = Chuoi + XL_DON_THUC.Chuoi(P) + "\n";
Chuoi = Chuoi + "voi x0=" + x0;
Chuoi = Chuoi + " la " + kq;
XL_CHUOI.Xuat(Chuoi);
}
