Description: School management system, create a new table " < <endl
cout< " 2.查询表"< endl
cout< " 3.修改表里的记录"< endl
cout< " 4.增加表里的记录"<<endl
cout<<" 5.删除表里的记录"<<endl
cout<<" 6.对表的数据排序"<<endl
cout<<" 7.统计表的总分和平均分"<<endl
cout<<" 8.保 存 表 单"<<endl
cout<<" 9.退 出 程 序"<<endl
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xuejiguanli.txt