static void Main(string[] args) { int[] balances = { 100, 50, 1500, 160, 100, 1512, 7912 }; var machine = new AtmMachine(balances); machine.InsertCard(2); machine.ShowBalance(); machine.WithdrawCash(100); machine.WithdrawCash(300); machine.EjectCard(); machine.InsertCard(0); machine.ShowBalance(); machine.WithdrawCash(10); machine.EjectCard(); }