Question

在c#中怎么给圆心p附初值

Answer 1

            Point center = new Point(20, 20);//圆心
            Graphics paper = pictureBox1.CreateGraphics();
            paper.Clear(this.BackColor);
            SolidBrush aBrush = new SolidBrush(Color.Green);
            Pen blackPen = new Pen(Color.Black, 1);
            int r = 10;

            Rectangle bar = new Rectangle(center.X - r, center.Y - r, center.X + r, center.Y + r);//圆心转换成矩形
            paper.FillEllipse(aBrush, bar);
            paper.DrawEllipse(blackPen, bar);

            bar.Y += 80;
            aBrush.Color = Color.Yellow;
            paper.FillEllipse(aBrush, bar);
            paper.DrawEllipse(blackPen, bar);
            bar.Y += 80;
            aBrush.Color = Color.Red;
            paper.FillEllipse(aBrush, bar);
            paper.DrawEllipse(blackPen, bar);

Answer 2

把你的方法贴上来，我告诉你怎么赋值