static void Main(string[] args)
{
int d = 0;
Animal a = new Animal();
while (d >= 0)
{
d++;
Console.WriteLine("Nhap ten dong vat: ");
string name = Console.ReadLine();
Console.WriteLine("Nhap tieng keu dong vat: ");
string sound = Console.ReadLine();
Console.WriteLine(a.idNum);
Console.WriteLine(name + " se keu " + sound);
Console.WriteLine(a.numofAnimal());
}
}
