创建成绩管理档案文件(若已存在则直接使用该文件)，它包含学号，英语、高数、体育，语文、物理、及它们的平均成绩等七项内容。试编写一管理程序，要求系统显示如下菜单，按键后执行相应的操作。-To create a performance management file file (if there is to directly use the file), which contains seven items of the school, English, advanced mathematics, sports, language, physical, and their average performance. Try to write a management program, the system displays the following menu, button and perform the appropriate action.