public Phanso Tru(Phanso b)
{
Phanso tru = new Phanso();
tru.ts = this.ts * b.ms - b.ts * this.ms;
tru.ms = this.ms + b.ms;
tru.ToiGian();
return tru;
}
public Phanso Cong(Phanso b)
{
Phanso tong = new Phanso();
tong.ts = this.ts * b.ms + b.ts * this.ms;
tong.ms = this.ms + b.ms;
tong.ToiGian();
return tong;
}
public static Phanso operator -(Phanso t1, Phanso t2)
{
Phanso tru = new Phanso();
tru.ts = t1.ts * t2.ms - t2.ts * t1.ms;
tru.ms = t2.ms * t1.ms;
tru.ToiGian();
return tru;
}
public static Phanso operator +(Phanso t1, Phanso t2)
{
Phanso tong = new Phanso();
tong.ts = t1.ts * t2.ms + t2.ts * t1.ms;
tong.ms = t2.ms * t1.ms;
tong.ToiGian();
return tong;
}