public CauHoi(string ma, ChuDe cd, string ndung, string dapan, string daydu)
{
maCauHoi = ma;
chuDe = cd;
noiDung = ndung;
dapAn = dapan;
dapAnDayDu = daydu;
}
public override CauHoi GetQuestion(ChuDe cd)
{
List <CauHoi> l = data.GetQuestion(cd);
Random rdm = new Random();
bool isSame;
int ques;
int count = 0;
for (int i = 0; i < cauHoi.Count; i++)
{
for (int j = 0; j < l.Count; j++)
{
if (cauHoi[i].Topic.IDTopic == l[j].Topic.IDTopic && cauHoi[i].IDQuestion == l[j].IDQuestion)
{
count++;
}
}
}
do
{
isSame = false;
ques = rdm.Next(l.Count);
int i;
for (i = 0; i < cauHoi.Count; i++)
{
if (cauHoi[i].IDQuestion == l[ques].IDQuestion)
{
isSame = true;
}
}
if (i == cauHoi.Count && isSame == true && count == l.Count)
{
return(new CauHoi("", cd, "", "", ""));
}
} while (isSame);
cauHoi.Add(l[ques]);
return(l[ques]);
}
public override CauHoi GetQuestion(ChuDe cd)
{
throw new NotImplementedException();
}
public abstract CauHoi GetQuestion(ChuDe cd);
