static void Main(string[] args)
{
Diem a = new Diem();
a.Nhap();
a.Hien();
Diem b = new Diem();
b.Nhap();
b.Hien();
Console.WriteLine("khoang cach la" + a.Khoangcach(b));
Console.ReadKey();
}
static void Main(string[] args)
{
Diem a = new Diem();
Diem b = new Diem();
a.Nhap();
b.Nhap();
a.HienThi();
b.HienThi();
double kc = a.KhoangCach(a, b);
Console.WriteLine("Khoang cach cua hai diem la: {0}", kc);
Console.ReadKey();
}
