程序：購物車程序

需求:

1. 啟動程序後，讓用戶輸入工資，然後打印商品列表
2. 允許用戶根據商品編號購買商品
3. 用戶選擇商品後，檢測余額是否夠，夠就直接扣款，不夠就提醒
4. 可隨時退出，退出時，打印已購買商品和余額

#coding=utf-8
#Version:python 3.6.0
#Tools:Pycharm 2017.3.2
_date_ = ‘2018/4/16/016 14:50‘
_author_ = ‘Hongyong‘

salary = int(input("Please input your salary: "))
shoppingmart = []
items = (["1. ","Huawei","￥",2800],
         ["2. ","Earphone","￥",300],
         ["3. ","Book","￥",80])
print(items)
while True:
    shopindex = int(input("Please choose goods: "))
    if salary > items[shopindex-1][3]:
        shoppingmart.append(items[shopindex-1])
        salary -= int(items[shopindex-1][3])
        print("You have bought {name} !".format(name = items[shopindex-1][1]))
        print("Your balance is: ￥",salary)
        decision = input("Do you want to quit now?")
        if decision == "q":
            break
        else:
            continue
    else:
        print("Your balance is not enough! Please try sth else.")
print("You have bought ",shoppingmart)

Python學醫第二天——購物車程序