static void Main(string[] args) { //Bai 2 //Book book1 = new Book("B1234", "Mindset", 7000, 700); //book1.giaSachFinal(); //Bai 5 Circle ht1 = new Circle(-1); Circle ht2 = new Circle(2); Console.WriteLine("Dien tich hinh tron1: " + ht1.dientich()); Console.WriteLine("Chu vi hinh tron1: " + ht1.chuvi()); Console.WriteLine("Dien tich hinh tron2: " + ht2.dientich()); Console.WriteLine("Chu vi hinh tron2: " + ht2.chuvi()); //Bai7 //Console.Write("Nhap vao trai banh n="); //int n = int.Parse(Console.ReadLine()); //Ball[] ht = new Ball[n]; //for(int i = 0; i < n; i++) //{ // ht[i] = new Ball(); //} //Console.Write("Trai banh dau tien "); //ht[0].inPut(); //for(int i = 0; i <n; i++) //{ // ht[i].outPut(); //} //ht[0].Throw(); //ht[1].Throw(); //ht[0].Pop(); //ht[0].Throw(); //for(int i = 0; i < n; i++) //{ // Console.Write("So lan nem banh {0} la {1}", i + 1, ht[i].timeofthrow); //} Console.ReadKey(); }