从磁盘中读取学生和课程信息，完成下列功能：1:学生信息（按学号升序）2:课程信息（按课号升序） 3:显示成绩表（先按学号升序，学号相同按课程号升序） 4:输入学号查询所有成绩信息-Students read from the disk and course information, complete the following functions: 1: Student Information (by student number ascending) 2: Course Information (click Lesson No. Ascending) 3: Displays the results table (initially Student ID ascending, student number at the same Course No. Ascending) 4: Enter the Student ID check all the performance information