public static Dathuc operator -(Dathuc dt1, Dathuc dt2)
{
Dathuc dt_tong = new Dathuc();
for (int i = 0; i < dt1.Sopt; i++)
{
dt_tong.ThemSohang(dt1.DT[i].Hs, dt1.DT[i].Mu);
}
for (int i = 0; i < dt2.Sopt; i++)
{
dt_tong.ThemSohang(dt2.DT[i].Hs, dt2.DT[i].Mu);
}
dt_tong.SapGiamDanTheoSoMu();
for (int i = 0; i < dt_tong.Sopt - 1; i++)
{
if (dt_tong.DT[i].Mu == dt_tong.DT[i + 1].Mu)
{
dt_tong.DT[i].Hs -= dt_tong.DT[i + 1].Hs;
for (int j = i + 1; j < dt_tong.Sopt - 1; j++)
{
dt_tong.DT[j] = dt_tong.DT[j + 1];
}
dt_tong.Sopt--;
i--;
}
}
return(dt_tong);
}
public static Dathuc operator +(Dathuc dt1, Dathuc dt2)
{
Dathuc dt_tong = new Dathuc();
for (int i = 0; i < dt1.Sopt; i++)
{
dt_tong.ThemSohang(dt1.DT[i].Hs, dt1.DT[i].Mu);
}
for (int i = 0; i < dt2.Sopt; i++)
{
dt_tong.ThemSohang(dt2.DT[i].Hs, dt2.DT[i].Mu);
}
dt_tong.SapGiamDanTheoSoMu();
dt_tong.RutGonDaThuc();
return(dt_tong);
}