购物车作业详解 


买家  卖家  商品  金钱
 1 # 把货物放在货架上
 2 li = [
 3     {'name':'苹果', 'price':1},
 4     {'name':'香蕉', 'price':1},
 5     {'name':'西瓜', 'price':10},
 6     {'name':'橘子', 'price':0.5},
 7 ]
 8 shopping_car = {}           # 建立一个空购物车
 9 print('欢迎光临水果店')
10 money = input('让我看看你有多少钱:')
11 if money.isdigit() and int(money) > 0:
12     while 1:
13         for i,k in enumerate(li):
14             print('序号:{}\t商品:{}\t价格:{}'.format(i, k['name'], k['price']))
15         choose = input('请输入您要购买的商品序号:')
16         if choose.isdigit() and int(choose) < len(li):
17             num = input('您要购买的商品数量:')
18             if num.isdigit():
19                 if int(money) > li[int(choose)]['price'] * int(num):
20                     money = int(money) - li[int(choose)]['price'] * int(num)
21                     if li[int(choose)]['name'] in shopping_car:
22                         shopping_car[li[int(choose)]['name']] += int(num)       # 若商品已经在购物车中, 则增加数量
23                     else:
24                         shopping_car[li[int(choose)]['name']] = int(num)
25                     print('购物车中的商品有:{}\t\t您的余额为:{}'.format(shopping_car,money))
26                 else:
27                     print('余额不足')
28                     break
29         else:
30             print('您输入的序号有误')

 

posted @ 2018-07-15 10:21  李培冠  阅读(565)  评论(0)    收藏  举报