文件名称:1
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学生成绩管理系统 实现了1、 有5个学生，每个学生有2门课成绩，从键盘上输入以上数据
（学生信息包括学号、姓名，以及2门课成绩），保存在一个文本文件中。
2、 计算出每个学生的总成绩，并将学生数据（包括学生2门课的总成绩）
按总分由高到低排序后保存到磁盘文件sort.txt中。
3、 统计平均成绩，不及格比例，及格比例、优良中所占比例。
4、 要求用菜单方式选择功能-Student achievement management system 1, there are five students, each student has two classes results from more than keyboard input data (student information, including Student ID, name, and class 2 results), stored in a text file . 2, calculate the total score of each student, and students (including students of two classes a total score of) high to low Sort by Total after the document is saved to disk in sort.txt. 3, statistical average, the proportion of failure, the proportion of passes, the proportion of the fine. 4, asked to use the menu options function
（学生信息包括学号、姓名，以及2门课成绩），保存在一个文本文件中。
2、 计算出每个学生的总成绩，并将学生数据（包括学生2门课的总成绩）
按总分由高到低排序后保存到磁盘文件sort.txt中。
3、 统计平均成绩，不及格比例，及格比例、优良中所占比例。
4、 要求用菜单方式选择功能-Student achievement management system 1, there are five students, each student has two classes results from more than keyboard input data (student information, including Student ID, name, and class 2 results), stored in a text file . 2, calculate the total score of each student, and students (including students of two classes a total score of) high to low Sort by Total after the document is saved to disk in sort.txt. 3, statistical average, the proportion of failure, the proportion of passes, the proportion of the fine. 4, asked to use the menu options function
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1.cpp