文件名称:2
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设计一个学生成绩排名系统，该系统的主要功能如下：
1) 具备对成绩的管理功能（添加、删除、排序）
2) 具备对成绩的统计功能（最高分，最低分，平均分，及格率等）
3) 具备按学号、姓名、或课程名查询成绩的功能。
4）学生成绩应该保存在文件中。
备注：成绩记录以下信息：班级，学号，姓名，课程名，成绩（百分制）。可以用能表示学生成绩的结构体数组存储数据。
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Design a student performance ranking system, the main features of the system are as follows:
1) have the right performance management functions (add, delete, sort)
2) have on the results of statistical functions (the highest score, lowest score, average passing rate, etc.)
3) have by student number, name, or course name query performance features.
4) student achievement should be saved in a file.
Note: track record the following information: class, student number, name, course name, score (percentile). You can use the structure can represent an array of student achievement data storage.
1) 具备对成绩的管理功能（添加、删除、排序）
2) 具备对成绩的统计功能（最高分，最低分，平均分，及格率等）
3) 具备按学号、姓名、或课程名查询成绩的功能。
4）学生成绩应该保存在文件中。
备注：成绩记录以下信息：班级，学号，姓名，课程名，成绩（百分制）。可以用能表示学生成绩的结构体数组存储数据。
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Design a student performance ranking system, the main features of the system are as follows:
1) have the right performance management functions (add, delete, sort)
2) have on the results of statistical functions (the highest score, lowest score, average passing rate, etc.)
3) have by student number, name, or course name query performance features.
4) student achievement should be saved in a file.
Note: track record the following information: class, student number, name, course name, score (percentile). You can use the structure can represent an array of student achievement data storage.
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2.cpp