成绩管理软件：用C语言为教务管理人员编写一个学生成绩管理软件，对学生某学期的成绩信息进行管理，学生成绩记录包括：学号、姓名、学期、每门课程的成绩、平均成绩、名次等，学生成绩记录按学号有序存储在文件中。功能要求：学生成绩信息的录入、修改、删除和查询等功能。查询方式要求灵活多样，如：按学期、学号、姓名、成绩不及格等进行条件的组合查询。-Performance management software: the Senate with the C language to write a management student achievement management software, performance of students in a semester management information, student achievement records, including: student number, name, semester, each course of performance, average scores, rankings and so, their performance records ordered by Student ID is stored in the file. Functional requirements: student performance information input, modify, delete, and query functions. Query approach requires flexible, such as: by semester, student number, name, a failing grade for conditions such as a combination of queries.