利用graphics.h通过描像素点实现在屏幕上绘制图像，效果是在屏幕上绘制一个机器猫，上面有五角星，颜色会改变，里面涉及到直线、圆等的算法以及递归填充算法，很适合新手学习-Use graphics.h achieved by scanning pixel on the screen to draw the image, the effect is to draw a Viking on the screen, above the five-pointed star, the color wil