1.猜年龄，连续猜三次，猜对了或不想猜了退出，猜错了判断是否继续

a=0
while a<3:
    age = int(input('请输入年龄：'))
    if age < 19:
        print('猜小了，往大了猜')
        pass
    elif age > 19:
        print('猜大了，往小了猜')
        pass
    else:
        print('猜对了')
        break
    a+=1
    if a==3:
        word=input('是否继续？')
        if word=='Y' or word=='y':
            a=0
            pass
        elif word=='N' or word=='n':
            print('期待您下次光临')
            break
        else:
            print('好家伙你字母输错了der逼')
            pass
        pass
    pass