设计一个简单学生个人信息管理系统，该系统具有录入，查询，修改三项基本功能。此模块是登陆界面，具有登陆的管理权限人员，密码校验-Students design a simple personal information management system that has input, query, modify the three basic functions. This module is a login screen, with the landing of personnel management authority, the password check