public static PhepToan getCongThuc(PhepToan giatri)
{
string ct = giatri.Congthuc.Trim();
string[] items = ct.Split(new Char[] { '-', '+', 'x', ':' });
string tm = "";
if (ct.Contains("+"))
{
tm = ClsLanguage.doTong();
}
else if (ct.Contains("-"))
{
tm = ClsLanguage.doHieu();
}
else if (ct.Contains("x"))
{
tm = ClsLanguage.doNhan();
}
else if (ct.Contains(":"))
{
tm = ClsLanguage.doChia();
}
if (tm.Trim().Equals(""))
{
return(new PhepToan("" + giatri.Congthuc, giatri.Ketqua, "number"));
}
else
{
return(new PhepToan(tm + items[0] + ClsLanguage.doAnd() + items[1], giatri.Ketqua, "number"));
}
}