EVC 下一个圆形时钟的代码

    CDC *pDC=this->GetDC();
    CRect rc(100,100,390,390); 
//    GetClientRect( &rc );
    int xStart = (rc.right+rc.left)/2;
    int yStart = (rc.bottom+rc.top)/2;
    CTime time = CTime::GetCurrentTime();
    CString strDigits;
    int i,x,y;
    CSize size;    
    CPen Pen(PS_SOLID,5,RGB(0,0,0));
    CPen *pOldPen=pDC->SelectObject(&Pen);
    pDC->Ellipse(rc.left+5,rc.top+5,rc.right-5,rc.bottom-5);
    double Radians;
    pDC->SetTextColor(RGB(0,0,0));
    for(i=1; i<=12; i++){
        strDigits.Format(_T("%d"),i);
        size =pDC->GetTextExtent(strDigits,strDigits.GetLength());
        Radians=(double)i*6.28/12.0;//弧度数
        x=xStart-(size.cx/2)+
            (int)((double)((rc.right-rc.left-30)/2)*sin(Radians));
        y=yStart-( size.cy/2)-
            (int)((double)((rc.right-rc.left-30)/2)*cos(Radians));
        pDC->ExtTextOut( x, y, ETO_CLIPPED  ,NULL,strDigits,strDigits.GetLength(),NULL );
    }
    Radians = (double)time.GetHour()+(double)time.GetMinute()/60.0+
            (double)time.GetSecond()/3600.0;
    Radians *= 6.28/12.0;
    CPen HourPen(PS_SOLID,5,RGB(0,0,0));
    pDC->SelectObject(&HourPen);
    pDC->MoveTo(xStart,yStart);
    pDC->LineTo(xStart+(int)((double)((rc.right-rc.left-30)/2/3) *sin(Radians)),
        yStart-(int)((double)(((rc.bottom-rc.top-30)/2)/3)*cos(Radians)));
    Radians=(double)time.GetMinute()+(double)time.GetSecond()/60.0;
    Radians*=6.28/60.0;
    CPen MinutePen(PS_SOLID,3,RGB(0,0,0));
    pDC->SelectObject(&MinutePen);
    pDC->MoveTo(xStart,yStart);
    pDC->LineTo(xStart+(int)((double)(((rc.right-rc.left-30)/2*2)/3)*sin(Radians)),
        yStart-(int)((double)((((rc.bottom-rc.top-30)/2)*2)/3)*cos(Radians)));
    Radians=(double)time.GetSecond();
    Radians*=6.28/60.0;
    CPen SecondPen(PS_SOLID,1,RGB(0,0,0));

    pDC->SelectObject(&SecondPen);
    pDC->MoveTo(xStart,yStart);
    pDC->LineTo(xStart+(int)((double)(((rc.right-rc.left-30)/2*4)/5)*sin(Radians)),
        yStart-(int)((double)((((rc.bottom-rc.top-30)/2)*4)/5)*cos(Radians)));
    pDC->SelectObject(pOldPen);