简易的画图板 实现画点线，曲线，矩形，圆形，以及色彩的变换，填充等，另外还加入一个小小的文本操作程式。 直接编译后就可以使用。-simple drawing board to achieve painting point line, curve, rectangle, circle, and the color transformation, fill in the blanks, in addition to the text by adding a small operation programs. Directly after the compiler can use.