static void Main(string[] args)
{
Console.WriteLine("Enter contract data");
Console.Write("Number: ");
int number = int.Parse(Console.ReadLine());
DateTime date = DateTime.Now;
Console.Write("Contract value: ");
double value = double.Parse(Console.ReadLine());
Console.Write("Enter number of installments: ");
int installmentsNumber = int.Parse(Console.ReadLine());
Contract contract = new Contract(number, date, value, new List <Installment>());
ContractServices contractService = new ContractServices(new PayPalService());
contractService.ProcessContracts(contract, installmentsNumber);
Console.WriteLine("Installments:");
foreach (Installment installment in contract.Installments)
{
Console.WriteLine(installment.ToString());
}
}