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.

2.cpp

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