國立暨南國際大學 101 學年度第二學期小考試卷

(考試時間: 14:10-14:20)

1. (10%) If we replace the OnDraw() function in P.953 as below, what result will be shown on the screen after you run the program?  Please specify the coordinates of endpoints of each segment, or the coordinates of centers and boundaries.

   void CSketcherView::OnDraw(CDC* pDC)
   {
   	CSketcherDoc* pDoc = GetDocument();
   	ASSERT_VALID(pDoc);
   	if (!pDoc)
   		return;
   
   	CBrush aBrush(RGB(255,255,255));
   	CBrush* pOldBrush = pDC->SelectObject(&aBrush);
   
   	for (auto i=5; i>=1; i--)
   		pDC->Ellipse(i*10, i*10, (11-i)*10, (11-i)*10);
   }
   
   
   
   
   

2. (10%) If we replace the OnDraw() function in P.953 as below, what expression should be filled in the blanks if we want to obtain the following figure?
   
   void CSketcherView::OnDraw(CDC* pDC)
   {
       CSketcherDoc* pDoc = GetDocument();
       ASSERT_VALID(pDoc);
       if (!pDoc)
           return;
   
       for (auto i=1; i<6; i++)
           pDC->Rectangle(10,         ,              , (11-i)*10);
   }