Question

我有一个快速的问题给大家。我目前正在研究一个样本航空公司预订系统，如果用户是常旅客（10％折扣率），我很难显示折扣总额。以下是我的代码：

user_people = int(raw_input("Welcome to Ramirez Airlines!  How many people will be flying?"))
user_seating = str(raw_input("Perfect!  Now what type of seating would your party prefer?"))
user_luggage = int(raw_input("Thanks.  Now for your luggage, how many bags would you like to check in?"))
user_frequent = str(raw_input("Got it.  Is anyone in your party a frequent flyer with us?"))
user_continue = str(raw_input("Your reservation was submitted successfully.  Would you like to do another?"))
luggage_total = user_luggage * 50


import time
print time.strftime("Date and time confirmation: %Y-%m-%d %H:%M:%S")

seats_total = 0

if user_seating == 'economy':
    seats_total = user_people * 916
    print ('The total amount for your seats is: $'),seats_total

elif user_seating == 'business':
    seats_total = user_people * 2650
    print ('The total amount for your seats is: $'),seats_total

else: 
    print ('The total amount for your seats is: $'),user_people * 5180

print ('The total amount of your luggage is: $'),luggage_total

print ('Your subtotal for your seats and luggage is $'), luggage_total + seats_total

discount_amount = 0
discount_rate = 0.10

if user_frequent == 'yes':
    before_discount = luggage_total + seats_total
    after_discount = before_discount * discount_rate
    discount_amount = before_discount - after_discount
    print discount_amount

else:
    print ('Sorry, the discount only applies to frequent flyers!')

虽然我没有收到错误，但我的输出不正确。这就是显示的内容：

Discount amount of 1738.8

这显然是不正确的，因为那是折扣后的价格。我试图显示总折扣以及折扣应用后的价格。

任何帮助将不胜感激！谢谢！

Answer 1

您有多个错误。首先，在第一个else的{{1}}中，您不计算if，因此以下计算会崩溃 - 您只需执行

seat_total

而不是明显需要的

print ('The total amount for your seats is: $'),user_people * 5180

（括号没用，但它们没有受伤，所以我让它们成为： - ）。

其次，看看你的折扣逻辑：

seat_total = user_people * 5180
print ('The total amount for your seats is: $'), seat_total

你明确地说非常，用折扣用户支付定价的十分之一 - 然后你在Q中抱怨它！ - ）

再一次，显而易见的是（对于人类在线间阅读 - 当然不是计算机:-)，这与你说的形成鲜明对比，你实际上意味着什么是：

discount_rate = 0.10

if user_frequent == 'yes':
    before_discount = luggage_total + seats_total
    after_discount = before_discount * discount_rate
    discount_amount = before_discount - after_discount

在Python 2.7中应用折扣并显示折扣率

1 个答案: