static void Main()
{
PS t1 = new PS();
Console.WriteLine(" nhap phan so t1");
t1.nhap();
t1.hien();
PS t2 = new PS();
Console.WriteLine(" nhap phan so t2");
t2.nhap(); t2.hien();
Console.WriteLine("Tong hai phan so......");
PS t = t1.Tong(t2);
t.hien();
Console.WriteLine("hieu hai phan so.......");
PS h = t1.hieu(t2);
h.hien();
Console.WriteLine("tich hai phan so .......");
PS f = t1.Tich(t2);
f.hien();
Console.WriteLine("thuong hai phan so......");
PS Y = t1.thuong(t2);
Y.hien();
}
public PS thuong(PS t2)
{
PS t = new PS();
t.ts = this.ts * t2.ms;
t.ms = this.ms * t2.ts;
return(t);
}
public PS hieu(PS t2)
{
PS t = new PS();
t.ts = this.ts * t2.ms - this.ms * t2.ts;
t.ms = this.ms * t2.ms;
return(t);
}