| 1. | We have achieved the many operation to the graph such as : display , insert , delete , and efface the overlay of graphs , at the same time we achieved the function of the select of graphic menu and input of characters
我们实现了图形的显示、插入、删除、消除图形的重叠等功能，实现了对图形菜单的选择和文字的输入功能。 |
