题目: 购物车程序
业需求:
数据结构：
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
......
]
功能要求：
基础要求：
1、启动程序后，输入用户名密码后，让用户输入工资，然后打印商品列表
2、允许用户根据商品编号购买商品
3、用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒
4、可随时退出，退出时，打印已购买商品和余额
5、在用户使用过程中， 关键输出，如余额，商品已加入购物车等消息，需高亮显示
扩展需求：
1、用户下一次登录后，输入用户名密码，直接回到上次的状态，即上次消费的余额什么的还是那些，再次登录可继续购买
2、允许查询之前的消费记录
基础功能实现：
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
]
goods.append("退出")
name = input("what is your name:")
password = input("input your password:")
salary = int(input("how much your salary:"))
for index,items in enumerate(goods):
print(index,items)
cart=[]
while True:
commodity = int(input("input goods what your want to buy:"))
if commodity >= len(goods):
print("your input number is over goods's price")
continue
elif commodity == int(len(goods) - 1):
# salary = salary - goods[commodity]["price"]
print("Your balance is \033[1;32m$% s\033[0m!" % salary)
print("your have buy some such as \033[1;32m% s\033[0m!" % cart)
break
else :
print(goods[commodity])
if goods[commodity]["price"] <= salary :
salary = salary - goods[commodity]["price"]
cart.append(goods[commodity])
print("\033[1;32mThe merchandise has been added to the shopping cart\033[0m!.Your balance is \033[1;32m$% s\033[0m!" % salary)
else:
print("You have \033[1;31m$% s\033[0m!, \033[1;31mYou don't have enough balance!!!\033[0m!" % salary)
