static void Main(string[] args)
{
phanso a = new phanso();
a.nhap();
a.show();
phanso b = new phanso(a);
b.show();
Console.ReadLine();
}
static void Main(string[] args)
{
phanso a = new phanso();
a.nhap();
a.xuat();
phanso b = new phanso();
b.nhap();
b.xuat();
phanso c = new phanso();
c = a.cong(b);
Console.WriteLine($"tong 2 phan so la :{c.ts}/{c.ms} ");
c = a.tru(b);
Console.WriteLine($"hieu 2 phan so la :{c.ts}/{c.ms} ");
c = a.nhan(b);
Console.WriteLine($"tich 2 phan so la :{c.ts}/{c.ms} ");
c = a.chia(b);
Console.WriteLine($"thuong 2 phan so la :{c.ts}/{c.ms} ");
Console.ReadLine();
}