用户文档：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。-User documentation: input from small to big numbers at school to " study number, score, name" format, student number in the ten, the scores have to be integers, the name can