通过此系统可以实现如下功能：

1）录入歌手的基本信息，包括姓名，编号

2）成绩计算：先录入十个评委的打分，之后在计算十个评委的成绩总和以及平均成绩（去掉最高分，去掉最低分，再计算平均成绩）

3）成绩排序：对选手按平均分进行排序

4）数据查询，○1按编号查询歌手的成绩：输入编号，如果存在，输出选手的数据，不存在，输出 “信息不存在”。○2按姓名查询歌手成绩。输入选手姓名，存在，则输出选手数据，不存在，则输出 “信息不存在

5）追加学生数据：追加选手数据（包括歌手姓名和编号），如果添加的选手已经存在，则不能插入，不存在，则输出“成功插入

6）写入数据文件：将输入的信息进行保存，保存到自己所写的文件中。

7）退出系统。

-This system can achieve the following functions: 1) Entry singer basic information, including name, number 2) Grading: ten judges scoring the first entry, and then calculating the sum of ten judges scores and grade point average (remove the highest score, remove the lowest score, and then calculates the average score) 3) Sort results: the players are sorted according to the average of four) data query, ○ 1 singer query results by number: Enter the number, if it exists, the output data players, there is no output " information does not exist."　○ 2 singers by name query results. Enter the player name exists, the output player data does not exist, then output " information does not exist 5) Additional student data: Add player data (including artist name and number), if the added players already exists, can not be inserted, there is no , output " successfully inserted 6) write data files: save the entered information, save it to their own written documents. 7) exit the sys