求解！！！！！！VC画圆弧！！急！！！

Question

有人会用VC画圆弧吗？已知圆心，圆弧上面两点！！！求解！！！
急！！！！QQ：979642339,求指导！！

Answer 1

圆心到圆弧上一点的距离是半径
直接用ellipse函数画圆就OK了

Answer 2

void CCurvesView::OnDraw(CDC* pDC)
{
   // Fill the client area with a thin circle. The circle's
   // interior is not filled. The circle's perimeter is
   // blue from 6 o'clock to 3 o'clock and red from 3
   // o'clock to 6 o'clock.   // Get the client area.
   CRect rectClient;
   GetClientRect(rectClient);   // Make a couple of pens.
   CPen penBlue;
   CPen penRed;
   CPen* pOldPen;   penBlue.CreatePen(PS_SOLID | PS_COSMETIC, 1, RGB(0, 0, 255));
   penRed.CreatePen(PS_SOLID | PS_COSMETIC, 1, RGB(255, 0, 0));   // Draw from 3 o'clock to 6 o'clock, counterclockwise,
   // in a blue pen.   pOldPen = pDC->SelectObject(&penBlue);   pDC->Arc(rectClient,
      CPoint(rectClient.right, rectClient.CenterPoint().y),
      CPoint(rectClient.CenterPoint().x, rectClient.right));   // Draw from 6 o'clock to 3 o'clock, counterclockwise,
   // in a red pen.
   pDC->SelectObject(&penRed);   // Keep the same parameters, but reverse start
   // and end points.
   pDC->Arc(rectClient,
      CPoint(rectClient.CenterPoint().x, rectClient.right),
      CPoint(rectClient.right, rectClient.CenterPoint().y));   // Restore the previous pen.
   pDC->SelectObject(pOldPen);
}

Answer 3

MSDN上面很清楚链接