高速椭圆绘制程序 　　程序中var16为有符号16位数字型，uvar16为16位无符号数字型，uvar32为无符号32位数字型，var32为有符号32位数字型。Ellipse参数中的x0,y0为圆心坐标，r1和r2分别为横半径和纵半径。PutPixel为画点函数。 -high-speed oval drawing program procedures var16 symbols for the median 16 H, 16 uvar16 for digital-type symbols, symbols uvar32 without median 32 H, as a symbol var32 median of 32 fonts. Ellipse parameters of x0, y0 coordinates for the center of a circle, r1 and r2 of longitudinal and transverse radius radius. PutPixel painting point function.