：（1）每次输入一个代号，执行一个操作，执行完后都回到界面，第一次执行操作时要先输入若干个学升记录。

（2）输入时按学号由小到大以“学号，分数，名字”格式，学号在十位内，分数要是整数，名字不能有空格，每输入一个学生记录后按一次回车。

（3）加上插入的一共可存放20个学生。即：若一开始输入5个学生记录，则最多可插入15个学生记录。-: (1) Each time you enter a code to perform an operation, after the implementation of the interface are returned, the first time to perform actions when the first input record number of school-liter. (2) input from small to big numbers by school as " student number, score, name"　format, student number in the ten, the scores have to be integers, the name can not have spaces to enter a student record for each time you press Enter after . (3) plus the insertion of a total of 20 students can be placed. Ie: If a record start typing five students, a maximum of 15 students into the record.