用 DDA算法算法实现直线段的绘制。

已知直线段的两个端点坐标分别为 P1(0,0) 和 P2(600,200),请用 DDA 算法

绘制出连接 P1 和 P2 的线段。背景要求为黑色，线段要求为白色。

-DDA algorithm algorithm line segment drawn. The known coordinates of the two endpoints of the line segment P1 (0,0) P2 (600,200), respectively, with a DDA algorithm to draw a line segment connecting P1 and P2. The background in claim black segment requirement as a white.