static void Main(string[] args)
{
int cao = 0, rong = 0, dai = 0;
var b = new Hop(cao, rong, dai);
var r = b.Nhap();
Console.WriteLine(r.TheTich());
Console.ReadKey();
}
public Hop Nhap()
{
Console.Write("nhap chieu cao cua hop ");
int chieuCao = int.Parse(Console.ReadLine());
Console.Write("nhap chieu rong cua hop ");
int chieuRong = int.Parse(Console.ReadLine());
Console.Write("nhap chieu dai cua hop ");
int chieuDai = int.Parse(Console.ReadLine());
var hop = new Hop(chieuCao, chieuRong, chieuDai);
return(hop);
}