day12 购物车系统实战

注册函数:

def regisiter():
    with open(r"F:\pylearn\day12\购物车系统\账号密码.txt","r",encoding="utf8") as fr:
        user_dict=dict()
        data=fr.read()
        for i in range(len(data.split())):
            user_dict[data.split()[i].split("|")[0]]=data.split()[i].split("|")[1]
    #egi_count=0
    while True:
        user_regi=input("注册:请输入你的用户名:>>>>")
        if user_regi not in user_dict:
            pwd_regi=input("注册:请输入你的密码:>>>>")
            pwd_regi_again=input("请再次输入你的密码:>>>>")
            if pwd_regi==pwd_regi_again :
                with open(r"F:\pylearn\day12\购物车系统\账号密码.txt", "a", encoding="utf8") as fw:
                    fw.write(f"\n{user_regi}|{pwd_regi}")
                    print("注册成功!")
                    break
            else:
                print("两次输入的密码不一致,请重新再试!")

        else:
            print("此用户名已被注册!请更换一个用户名!")
            #regi_count+=1

登陆函数:

def logging():
    logging_count=0
    with open(r"F:\pylearn\day12\购物车系统\账号密码.txt","r",encoding="utf8") as fr:
        user_dict=dict()
        data=fr.read()
        for i in range(len(data.split())):
            user_dict[data.split()[i].split("|")[0]]=data.split()[i].split("|")[1]
        print(user_dict)
    print("你一共有3次输入账号密码的机会!")
    while logging_count<3:
        username=input("请输入你的用户名:>>>")
        pwd=input("请输入你的密码:>>>")
        if username in user_dict and pwd==user_dict.get(username):
            print("恭喜您,登陆成功!")
            break
        else:
            print("登陆失败请重新再试!")

            logging_count+=1
            print(f"你现在还有{3-logging_count}次机会")
            if logging_count==3:
                print("次数已用尽,不允许再登陆!")

账户余额查询函数:

def salary_account():
    with open(r"F:\pylearn\day12\购物车系统\账户余额.txt","r",encoding="utf8") as fr:
        salary=int(fr.read())
        #print("您的账户余额为:\n",salary)
    return salary

商品列表查询函数:

def sale_display():
    sale_dict=dict()
    with open(r"F:\pylearn\day12\购物车系统\商品列表.txt","r",encoding="utf8") as fr:
        sale_data=fr.read()
        for i in range(len(sale_data.split())):
            sale_dict[sale_data.split()[i].split(":")[0]]=sale_data.split()[i].split(":")[1]
        #print("商品列表如下:\n",sale_dict)

    return sale_dict

buy函数():

import sale_display
import salary_account
def buy():
    with open(r"F:\pylearn\day12\购物车系统\已购买商品.txt", "w", encoding="utf8") as fa:
        fa.write("已购列表:\n")
    money=salary_account.salary_account()
    sale_dict=sale_display.sale_display()
    #print("商品列表如下:\n", sale_dict)
    buy_flag=True
    while buy_flag:
        print("商品列表如下:\n", sale_dict)
        money = salary_account.salary_account()
        print(f"您的余额为:{money}")
        print("*"*120)
        target=input("请输入你想要买的东西:>>>")
        print("*" * 120)
        if target in sale_dict:
            price=int(sale_dict.get(target))
            print(f"{target}的单价为:{price}")
            print("*" * 120)
            num=int(input("请输入你购买的数量:>>>"))
            print("*" * 120)
            confim=input(f"确认购买吗?一共需要花费{num*price}块大洋!确认请按y,取消请按n:\n").strip()
            print("*" * 120)
            if confim=="n":
                print("欢迎下次光临!")
                print("*" * 120)
            if confim=="y" and money>price*num:
                #print("购买成功!")
                with open(r"F:\pylearn\day12\购物车系统\账户余额.txt","w",encoding="utf8") as fw:
                    fw.write(f"{money-price*num}")
                print(f"恭喜您成功购买{num}件{target}")
                print("*" * 120)
                #salary_account.salary_account()
                money = salary_account.salary_account()
                print(f"您的余额为:{money}")
                print("*" * 120)
                with open(r"F:\pylearn\day12\购物车系统\已购买商品.txt","a",encoding="utf8") as fa:
                    fa.write(f"商品名:{target}   数量:{num}\n")
                buy_again=input("是否选择继续购买,继续请按y,结束请按n\n")
                print("*" * 120)
                if buy_again=="y":
                    print("请继续选购!")
                    print("*" * 120)
                    #print("商品列表如下:\n", sale_dict)
                    #print("*" * 120)
                if buy_again=="n":
                    buy_flag=False
                    print("欢迎下次再来!")
                    print("*" * 120)
                with open(r"F:\pylearn\day12\购物车系统\已购买商品.txt","r",encoding="utf8") as fr:
                    buy_list=fr.read()
                    print("以下是已购商品列表\n",buy_list)
            if confim == "y" and money < price*num:
                print("余额不足,请充值!")
                print("*" * 120)
                insert_money=input("是否选择充值?充值请输入y,不充值请输入n:\n")
                print("*" * 120)
                if  insert_money=="y":
                    inset_money_num=int(input("请输入充值数量:>>>"))
                    print("*" * 120)
                    with open(r"F:\pylearn\day12\购物车系统\账户余额.txt","w",encoding="utf8") as fw:
                        fw.write(f"{money+inset_money_num}")
                    money = salary_account.salary_account()
                    #print(f"您的余额为:{money}")
                    #print("*" * 120)
                if insert_money=="n":
                    print("先去赚钱!")
                    print("*" * 120)
                    buy_flag = False
                    with open(r"F:\pylearn\day12\购物车系统\已购买商品.txt", "r", encoding="utf8") as fr:
                        buy_list = fr.read()
                        print("以下是已购商品列表\n",buy_list)
                    break


        else:
            print("您输入的商品不存在!请重新输入!")





#buy()

main函数:

#用户名和密码存放于文件中
# 启动程序后，先登录，登录成功则让用户输入工资,然后打印商品列表，失败则重新登录，超过三次则退出程序
# 允许用户根据商品编号购买商品
# 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
# 可随时退出，退出时，打印已购买商品和余额
import regisiter
import loggin
import buy
regi_flag=input("是否拥有账号?没有账号请输入n开始注册,否则按其他任意键开始登陆!>>>\n")
if regi_flag=="n":
    regisiter.regisiter()
    buy.buy()
else:
    loggin.logging()
    buy.buy()