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 achiev