/// <summary>
/// CPA关心每一次交易详情
/// </summary>
/// <param name="detail"></param>
public override void Visit(OutBillDetail detail)
{
Console.WriteLine("第{0}笔支出，摘要：{1}，交易金额：{2}", countOut++, detail.Summary, detail.Amount);
}
public abstract void Visit(OutBillDetail detail);
/// <summary>
/// 老板只关心总支出
/// </summary>
/// <param name="detail"></param>
public override void Visit(OutBillDetail detail)
{
TotalOut += detail.Amount;
}