static void Main(string[] args)
{
PHAN_SO A, B, kq;
A = XL_PHAN_SO.Nhap("Nhap phan so thu nhat:\n");
B = XL_PHAN_SO.Nhap("Nhap phan so thu hai:\n");
kq = XL_PHAN_SO.Tong(A, B);
String Chuoi;
Chuoi = XL_PHAN_SO.Chuoi(A) + " + ";
Chuoi = Chuoi + XL_PHAN_SO.Chuoi(B) + " = ";
Chuoi = Chuoi + XL_PHAN_SO.Chuoi(kq);
XL_CHUOI.Xuat(Chuoi);
}
public static PHAN_SO Tinh(BIEU_THUC P)
{
PHAN_SO kq;
kq = P.So_hang[0];
for (int i = 1; i < P.So_hang.GetLength(0); i++)
{
if (P.Toan_tu[i - 1] == TOAN_TU.Cong)
{
kq = XL_PHAN_SO.Tong(kq, P.So_hang[i]);
}
else
if (P.Toan_tu[i - 1] == TOAN_TU.Tru)
{
kq = XL_PHAN_SO.Hieu(kq, P.So_hang[i]);
}
}
return(kq);
}
