day12(练习题)

Posted 2020-10-27 爱学习爱生活的小九

一、购物车程序

需求：

• 启动程序后，让用户输入工资，然后打印商品列表
• 允许用户根据商品编码购买商品
• 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
• 用户可以一直购买商品，也可以随时退出，退出时，打印已购买的商品和余额

shoplist = []
commodity = [[‘iphonex‘,8888],[‘Book‘,99],[‘Macpro‘,7666],[‘小米6‘,3200]]
long = len(commodity)
wages = input("请输入你的工资--->")
if wages.isdigit() ==True:
    wages = int(wages)
    print(‘你的工资是‘,wages,‘元‘)
    while True:
        print(‘--------商品列表-------‘)
        for y, p in enumerate(commodity):
            print("{0}  {1} \t{2}".format(y, p[0], p[1], ‘元‘))
        need = input("请输入你需要购买的商品编号---->")
        if need == ‘q‘ or need == ‘Q‘:
            print(‘退出不买了‘)
            print("-----你的购物车-----")
            for y, p in enumerate(shoplist):
                print(y, p[0], p[1])
            # wages = wages - commodity[need][1]
            print("你剩余", wages, "元")
            break
        elif need.isdigit() == True:
            need = int(need)
            if wages >= commodity[need][1]:
                need = int(need)
            elif wages < commodity[need][1]:
                print("骚年去赚钱吧，你还剩", wages, "元了,还想买", commodity[need][0])
                continue
            if need >= 0 and need <= long:
                print(‘你购买了‘, commodity[need])
                shoplist.append(commodity[need])
                print("-----你的购物车-----")
                for y, p in enumerate(shoplist):
                    print(y, p[0], p[1])
                wages = wages - commodity[need][1]
                print("你剩余", wages, "元")
        else:
            print("你输入的什么玩意,请输入数字")
            continue
else:
    print("你输入的什么玩意，让你输入数字")

二、多级菜单

需求:

• 现有省市县三级结构，要求程序启动后，允许用户可依次选择进入各级子菜单，
• 可在任意一级菜单返回上一级
• 可以在任意一级菜单退出程序

menu = {
    ‘河北‘:{
        ‘承德‘:{
            ‘双桥区‘:‘贾营村‘
        }
    },
    ‘北京‘:{
        ‘通州区‘:{
            ‘东潞苑小区‘,‘我家‘
        }
    }
}
while True:
    print(menu.keys())
    choice = input("请输入你要查看的省份---")
    if menu.get(choice) != None:
        sub = menu[choice]
        #print(sub.keys())
        while True:
            print(sub.keys())
            choice_sub = input("请输入你要查看的市,或者返回上一级请输入R")
            if choice_sub == ‘r‘ or choice_sub == ‘R‘:
                break
            elif choice_sub == ‘q‘ or choice == ‘Q‘:
                print("程序退出")
                exit()
            elif sub.get(choice_sub) != None:
                print(sub[choice_sub])
                sub_sub = input("是否返回上一层，R=返回,e=退出")
                if sub_sub == ‘r‘ or sub_sub == ‘R‘:
                    print(‘返回上一层‘)
                else:
                    print(‘退出‘)
                    exit()
    elif choice == ‘q‘ or choice == ‘Q‘:
        print("程序退出")
        exit()