（1）文件功能

（2）有鼠标，键盘输入（可以画直线，折线，矩形，圆 ，三角形）

（3）具有选择图形，移动，删除功能

（4） 菜单功能

（5）可以选择线形，线宽，颜色

（6）具有坐标显示功能

文件功能，图形移动删除功能等局部功能没实现，大部分都可以实现，如果机器不支持全屏显示，可下个DosBox，在DosBox中运行-(1) File feature

(2) there is a mouse, keyboard input (you can draw a straight line, polyline, rectangle, circle, triangle)

(3) having the option graphics, move, delete function

(4) menus

(5) You can choose the alignment, width, color

(6) has a coordinate display

File functions, graphics and other local functions move the delete function did not realize, most of them can be achieved if the machine does not support full-screen display, the next DosBox, run in DosBox