static void Main(string[] args)
{
// 1.khai bao mang 5 hinh
// 2.tim vi tri va gia tri cua hinh co
// chu vi hoac dien tich lon nhat
hinh[] Arr = new hinh[5];
Arr[0] = new chuNhat();
Arr[1] = new hinhTron(1);
Arr[2] = new tamGiac(8, 9, 10);
Arr[3] = new hinhVuong(9);
Arr[4] = new chuNhat(6, 9);
double MaxTamCv = Arr[0].hCv();
double MaxTamDt = Arr[0].hDt();
int vtCv = 0;
int vtDt = 0;
for (int i = 1; i < Arr.Length; i++)
{
if (MaxTamCv < Arr[i].hCv())
{
MaxTamCv = Arr[i].hCv();
vtCv = i;
}
if (MaxTamDt < Arr[i].hDt())
{
MaxTamDt = Arr[i].hDt();
vtDt = i;
}
}
Console.WriteLine("dien tich tai {0} la max:{1}", vtDt, MaxTamDt);
Console.WriteLine("chu vi tai {0} la max:{1}", vtCv, MaxTamCv);
}
public hinhTron(hinhTron f) : base(4)
{
bk = f.bk;
}