作业.

注册

def register():
    registor_count = 0

    while registor_count < 3:
        username_inp = input('输入用户名:')
        userpwd_inp = input('输入密码:')
        re_userpwd_inp = input('再次输入密码:')
        if userpwd_inp == re_userpwd_inp:
            with open('user_info.txt','a',encoding = 'utf8') as fa:
                fa.write(f'{username_inp}:{userpwd_inp}\n')
            print('注册成功')
            break
        else:
            registor_count += 1
            print('密码不同')
            continue

登录

def login():
    username_inp = input('输入用户名:')
    userpwd_inp = input('输入密码:')

    with open('user_info.txt','r',encoding='utf8') as fr:
        for user_info in fr:
            user_name,user_pwd =user_info.split(':')
            if (user_name.strip() == username_inp and user_pwd.strip() == userpwd_inp):
                print('登录成功')
                break
        else:
            print('登录失败')

猜年龄

def guess_age():
    age = 18
    guess_count = 0
    while guess_count < 3:
        guess_age = int(input('你猜的年龄:'))
        guess_count += 1
        if guess_age > age:
            print('猜大了')
        elif guess_age < age:
            print('猜小了')
        else:
            print('猜对了')
            break
    else:
        print('呵呵 牛逼 牛逼')

选择奖品

def prize():
    prize_dict = {
        '1':'奖品1',
        '2':'奖品2',
        '3':'奖品3',
        '4':'奖品4'
    }
    print(prize_dict)
    prize_choice = input('选择一个奖品:')
    if prize_choice in prize_dict:
        print(f"你选择了一个{prize_dict.get(prize_choice)}")
    else:
        print('没有该商品')



def menu():
    register()
    login()
    guess_age()
    prize()


menu()