cout << "-------------1: 添加学生信息-----------------" << endl;
cout << "-------------2: 删除学生信息-----------------" << endl;
cout << "-------------3: 修改学生信息-----------------" << endl;
cout << "-------------4: 查找学生信息-----------------" << endl;
cout << "-------------5: 显示学生信息-----------------" << endl;
cout << "============================================" << endl;
1