1. According to the above table data in the main function in the file defined in the array, the input data,
2. Design a child function according to students' course selection table statistics courses each student's overall performance (according to the grades account for 30% of overall, test scores account for 70% of the overall computing),
3. Design a child function according to the overall output result from big to small order student number, course number, grades, test scores, overall rating scores,
4. Design a child function is complete, enter an overall rating scores, the students' course selection table using binary search to find the overall rating of the corresponding student id and the output,
5. Design a child function according to the overall output result from big to small order student id, name, course name, overall achievement
6. Design a child function according to the overall achievements from big to small order of student number, name, course name, zp to write to a file. The overall results TXT,
