制作一个图形元素表graphic element menu,表中将所需的各种字符图形编上号码，并用存储器映射法将其显示在屏幕的左上部分，将光标定位在屏幕的右半部分画图区。

上、下、左、右光标控制键控制光标在四个方向上移动，不显示其轨迹，同时要控制光标位置不超过画图区的边界。

当按动谋一个数字键时，在光标位置处显示出响应编号的字符图形，然后移动光标，再显示一个字符图形，最后绘制出一幅由字符组成的图形。

按动ESCape键，退出程序，返回DOS。-Table graphic elements to produce a graphic element menu, table will be required for a variety of characters numbered graphics and memory mapping method used to display the upper left part of the screen, position the cursor on the screen drawing area of the right part.

Upper and lower, left and right cursor control keys to control cursor movement in four directions, do not show the trajectory and at the same time to control the cursor position does not exceed drawing district boundaries.

When pressed to seek a number key when the cursor position in response to number shows graphics characters, and then move the cursor, and then display a graphic character, and finally draw a graph composed by the characters.

ESCape key pressed, exit procedures, return to DOS.