linux下的c语言代码，调用linux的Ncurses图形库，实现用户登录界面，tab键实现焦点转移，输入帐号admin 密码123456则提示登录成功，linux下 make clean；make编译，./main执行-linux c language code, call the Ncurses linux graphics library that implements the user login screen, tab key to shift the focus to achieve, enter the admin password 123456 prompted to log in successfully, linux under the make clean　make compilation,./main execution