c++builder 中的canvas指令怎么画圆弧？

protected void onDraw(Canvas canvas) {
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setColor(Color.argb(255, 255, 255, 255));

RectF oval1 = new RectF(20.0f, 20.0f, 60.0f, 60.0f);
canvas.drawArc(oval1, 0, 45, true, paint);

RectF oval2 = new RectF(100.0f, 20.0f, 140.0f, 60.0f);
canvas.drawArc(oval2, 0, 90, true, paint);

RectF oval3 = new RectF(180.0f, 20.0f, 220.0f, 60.0f);
canvas.drawArc(oval3, 90, 135, true, paint);

RectF oval4 = new RectF(260.0f, 20.0f, 300.0f, 60.0f);
canvas.drawArc(oval4, 90, 135, false, paint);
}本回答被提问者采纳

73.Caxa中圆弧拟合样条曲线命令怎么使用？