static void Main(string[] args) { Frete x = new Frete(double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine())); Console.WriteLine(x.CalcFrete()); FreteExpresso y = new FreteExpresso(double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine()), double.Parse(Console.ReadLine())); Console.WriteLine(y.CalcFrete()); }