说明：  投票系统能增加投票信息，删除投票信息，统计投票信息等。系统规定，针对每一个投票问题，每一个投票人仅能有一次投票机会，根据VIP与否（非VIP标记为not），计算票数的方法也不同(VIP投1票等于非VIP投3票)。涉及函数、结构体、链表、文件等方面的知识，学习利用链表处理数据的方法，熟练掌握文件操作，构建综合程序设计的思路及框架，提高综合设计软件系统的能力。
(Voting system can add voting information, delete voting information, count voting information, etc. According to the system, each voter can only have one chance to vote for each voting question. According to VIP or not (non VIP is marked as not), the method of calculating the number of votes is also different (one vote for VIP is equal to three votes for non VIP). It involves the knowledge of function, structure, linked list, file, etc. learn how to use linked list to process data, master file operation skillfully, construct the idea and framework of comprehensive program design, and improve the ability of comprehensive design software system.)