优惠券

src/main/java/com/qmrb/parking/fee/ParkingFeeCalculator.java

@@ -39,6 +39,8 @@ public class ParkingFeeCalculator {
         public double paidAmount; // 已支付金额
         public List<PaymentRecord> paymentRecords = new ArrayList<>(); // 支付记录
 
+        public CouponRecord couponRecord = new CouponRecord(); // 优惠券记录
+
     }
 
     // 支付记录类