static void Main(string[] args)
{
Mastercard master = new Mastercard();
master.usuario = "Gustavo";
master.parcelas = 2;
Console.WriteLine($"Seja Bem vindo {master.usuario}");
master.ComprarComDescontoMastercard(25f);
}
static void Main(string[] args)
{
Cartao cartao = new Cartao();
cartao.bandeira = "mastercard";
cartao.numero = "2043230900-07";
cartao.AprovarCompra();
Mastercard master = new Mastercard();
master.parcelas = 5;
master.ComprarComDescontoMastercard(20f);
}
