goods_list=[{"name":"iphone xs","price":6299,"number":10,},{"name":"huawei","price"\
:3999,"number":5},{"name":"xiaomi","price":1999,"number":15}]
shopping_cart=[]
flag=False
import os
def good():
print("\033[1;31m欢迎来到tongtong商场\033[0m".center(100,"*"))
print("序列号" + "\t", "商品名" + "\t", "价格" + "\t", "数量" + "\t")
for i,j in enumerate(goods_list):
print(str(i+1)+"\t",goods_list[i]["name"]+"\t",str(goods_list[i]["price"])+"\t",str(goods_list[i]["number"])+"\t")
def login():
sum=0
global flag
if flag==False:
print("\033[1;33m请登录\033[0m".center(100,"#"))
count=0
while count<3:
uname=input("pls input username:").strip()
pwd=input("pls input password:").strip()
with open ("infor.txt",encoding="utf-8") as f1:
user,password,money=f1.readline().split("|")
if uname==user and pwd==password:
print("\033[5;34m登录成功\033[0m")
flag=True
while True:
os.system("cls")
good()
use_select = input("请输入商品序号（q退出|c查看购物车|b结账付款）：")
if use_select.isdigit():
if int(use_select) > len(goods_list):
print("输入有误,请重新输入!")
continue
if int(money)>=(sum+goods_list[int(use_select) - 1]["price"]):
goods_name = goods_list[int(use_select) - 1]["name"]
while True:
nu = input("请输入购买数量：")
if nu.isdigit():
if int(nu) * goods_list[int(use_select) - 1]["price"] > int(money):
print("您的余额不足，请重新选择")
continue
else:
goods_list[int(use_select)-1]["number"]-=int(nu)
bought = "商品名:%s，数量:%s" % (goods_name, nu)
sum += int(nu) * goods_list[int(use_select) - 1]["price"]
shopping_cart.append(bought)
break
else:
print("余额不足，请从新选择！")
continue
continue
if use_select=="q":
flag=False
exit("谢谢光临！")
if use_select=="c":
if len(shopping_cart)==0:
print("您的购物车为空，请添加些商品吧！")
continue
else:
print(shopping_cart)
continue
if use_select=="b":
if len(shopping_cart)==0:
print("您的购物车为空，请添加些商品吧！")
continue
else:
b_s=input("确认结账（y确定|c取消）")
if b_s.lower()=="y":
yue=int(money)-sum
print("购买成功！")
print("您的余额剩余%s元"%(yue))
exit()
if b_s=="c":
continue
else:
print("输入有误，请重新输入！")
continue
else:
print("输入有误，您还有%s次机会"%(2-count))
count+=1
print("您输入的输入次数超过3次")
exit()
login()
