购物车

Posted 2021-03-21 xhwy-1234

@time 2019/12/17 15:18

"""
需求：
1、启动程序后，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、用户购买商品后，检测用户余额是否足够，够就直接扣款，不够就提醒
4、可随时退出，退出时，打印已购商品和余额
"""
# 1、第一步：创建商品列表，以及空的购物车列表以便接收商品
shopping_list = [("程咬金", 20), ("后羿", 40), ("李元芳", 50), ("王昭君", 80)]
buy_list = []
# 2、第二步：判断工资输入的正确性，以及转为int类型，以便下边代码比较时使用
salary = input("请输入您的工资：")
if salary.isdigit():
    salary = int(salary)
else:
    print("您是外星来的吗，请正确输入工资呢")
    exit()
# 3、创建死循环
while True:
    # 打印商品
    for shopping in shopping_list:
        print(shopping_list.index(shopping), shopping[:])
    # 上述两行代码可以使用：for index, shopping in enumerate(shopping_list):
    #                          print(index, shopping)
    shopping_number = input("请输入您要购买的商品编号：")
    # 判断
    if shopping_number.isdigit():
        shopping_number = int(shopping_number)
        if len(shopping_list) >= shopping_number >= 0:
            p_shopping = shopping_list[shopping_number]
            if p_shopping[1] <= salary:
                buy_list.append(shopping_list[int(shopping_number)])
                salary -= p_shopping[1]
                print("您已经购买%s,您的余额还有33[32;1m%d33[0m" % (shopping_list[int(shopping_number)][0], salary))
            else:
                print("33[31;1m您的余额不足，您的余额是%s33[0m" % salary)
        else:
            print("您真调皮，商品柜中没有该商品呢")
    elif shopping_number == "q":
        print("您购买的商品有", buy_list)
        exit()
    else:
        print("您真调皮，商品柜中没有该商品呢")