#coding=utf-8

'''

Created on 2015-6-18

@author: 悦文

'''

def goods_list(): 

    shangpin={"coffie":"","car":"","tea":"","book":""}

    print "-"*12 +u"商品列表" +"-"*12

    for key in shangpin:

        print "goods: %s --> price: %s" % (key,shangpin[key])

    print "-"*12 +u"商品列表" +"-"*12

    return shangpin

def jiesuan(money,shangpin_list):

    sheng_money=money

    while True:

        qt=raw_input(u"您需要购物吗？y/n \n")

        if qt=="y":

            gou_goods=raw_input(u"请输入您想购买的商品名字，购买的商品请参考商品列表：\n")

            if gou_goods in shangpin_list:

                sheng_money=int(sheng_money)-int(shangpin_list[gou_goods])

                if sheng_money>=0:

                    print " 您购买了%s商品，共消费 %s, 您还剩 %s元钱！" % (gou_goods,shangpin_list[gou_goods],sheng_money)

                else:

                    print "您的金钱不足,请充值，欢迎下次光临！"

                    break

            else:

                print "没有此商品！"

        else:

            print "欢迎下次光临！"

            break

if __name__== '__main__':

    shangpin_list=goods_list()

    try:

        money=raw_input(u"请充值后在购买商品，请输入充值金额：\n")

        print "您的充值金额为 %s,充值成功！"% (money)

    except IOError,e:

        print "输入错误，请检查!"

    jiesuan(money,shangpin_list)