第五天,复习第四天内容,购物车小程序作业.元组

#__author__:  zoe
#date:  2019/5/31
salary = int(input("欢迎光临本店,请输入您的预算:"))
print('1.  iphone6s','\t','5800','\n'
      '2.  mac book','\t','9000','\n'
      '3.  coffee','\t\t','32','\n'
      '4.  python book','','80','\n'
      '5.  bicycle','\t\t','1500',end='\n')
goods = ['0','ipone6s','mac book','coffee','python book','bicycle']
price = ['0','5800','9000','32','80','1500']
shopping_cart = list()
rest_cash = int(salary)
quit_flag = True
while quit_flag :
    choice = input('请选择商品或者按q退出:')
    if choice == 'q':
        quit_flag = False
        continue
    if rest_cash - int(price[int(choice)]) < 0:
        print('余额不足,请重新选择.还需要',-(rest_cash - int(price[int(choice)])))
        continue
    rest_cash -= int(price[int(choice)])
    shopping_cart.append(goods[int(choice)])
    print(goods[int(choice)],'已加入您的购物车,当前余额:',rest_cash)
else :
    print('欢迎下次光临,您已购买:',shopping_cart,'一共花费:',salary - rest_cash)

元组与列表类似
a=(1,2,3,4,5)
可以切片取值,不能修改元组里面的内容.

购物车程序可以继续优化.