掌握TC环境下编写程序实现计算机画图的基本方法，要求能以各种颜色画点，直线，圆等基本图形。 2． 理解windows环境下画图的方法。 3． 理解实现动画的基本处理方法。 -TC environment to prepare to master the computer drawing program to achieve the basic approach, which requires a variety of colors can draw points, lines, ci