屏幕窗口程序设计,①scrol——向上卷屏 ②clear——清屏 ③get_char——接受输入字符 ④display——在屏幕上显示字符 ⑤pos_curse——光标定位-Window screen programming, ① scrol- Volume up screen ② clear- Qing Ping ③ get_char- accept input characters ④ display- shows characters on the screen ⑤ pos