购物车小程序 

 1 salary = input("Input your salary:")
 2 if salary.isdigit():
 3     salary = int(salary)
 4 else:
 5     exit("Invaild data type")
 6 welcome_msg = "Welcome to Liangml shopping mall".center(50,"-")
 7 print(welcome_msg)
 8 exit_flag = False
 9 product_list = [
10     ("Iphone",5888),
11     ("Mac book",8888),
12     ("Mac Air",12345),
13     ("book",20),
14     ("Dell",12345),
15     ("Coffe",10)]
16 shop_car = []
17 while not exit_flag:
18     #for product_item in product_list:
19      #   p_name,p_price = product_item
20     print("product list".center(50,"-"))
21     for item in enumerate(product_list):
22         index = item[0]
23         p_name = item[1][0]
24         p_price = item [1][1]
25         print(index,".",p_name,p_price)
26     user_choice = input("[q=quit,c=check]What do you wang to buy?:")
27     if user_choice.isdigit():#肯定是选商品
28         user_choice = int(user_choice)
29         if user_choice < len(product_list):
30             p_item = product_list[user_choice]
31             if p_item[1] <= salary:#买的起
32                 shop_car.append(p_item)#放入购物车
33                 salary -= p_item[1]#扣钱
34                 print("Added [%s] into shop car,you current balance is [%s]"%
35                       (p_item,salary))
36             else:
37                 print("You balance is [%s],cannot afford this...."%salary)
38     else:
39         if user_choice == "q"  or  user_choice == "quit":
40             print("purchased products as below".center(40,"*"))
41             for item in shop_car:
42                 print(item)
43             print("END".center(40,"*"))
44             print("Your balace is [%s]"% salary)
45             exit_flag = True

 

posted @ 2016-10-12 17:10  Callum  阅读(171)  评论(0)    收藏  举报