C / C++ / MFC

savitri wrote:

Hex_Dec(val$, ByVal start As Byte) As Byte

savitri wrote:

we use this to convert hex number but i am not getting how to declare that function why that $ is used..

char sTmp[10] = {0};
char val = 0xAB; // hex value, ABh
sprintf(sTmp, "%X", val);

savitri wrote:

but i am not getting how to declare that function why that $ is used..

savitri wrote:

Hex_Dec(val$, ByVal start As Byte) As Byte, how shall i declare the same fuction in VC++.

li zhiyuan wrote:

ucImgdata=(0.3*ucImgdata[iX+2] + 0.59*ucImgdata[iX+1] + 0.11*ucImgdata[iX]);

error C2440: '=' : cannot convert from 'double' to 'unsigned char *'

Rajkumar R wrote:

but i think the current available code is not written yourself. you need to be familiar with basic array, pointer concepts.

Maxwell Chen wrote:

People here keep telling him this, but he just doesn't listen ...

ThatsAlok wrote:

but could we try to find why yuo he don't want to listen.. any language problem, since by name he seems to no english speaking country!

for(int y = y_start; y < y_end; y++)<br />
for(int x = x_start; x < x_end; x++)<br />
{<br />
  pImageGray[x+y*width] = pImageRGB[x*3 + y*width*3 + 0]*0.112 + pImageRGB[x*3 + y*width*3 + 1]*0.59 + pImageRGB[x*3 + y*width*3 + 2]*0.33;<br />
<br />
}

li zhiyuan wrote:

error C2440: '=' : cannot convert from 'double' to 'unsigned char *'

#pragma push_macro("new")
#undef new
        CClientDC clidc(this); <font color="Green">// use an appropriate HDC for your code</font>
        Gdiplus::Font *pFont=new Gdiplus::Font(L"Tahoma", 12, FontStyleRegular, UnitPixel);
        Graphics gr(clidc);
        PointF origin(0.0f, 0.0f);
        SolidBrush blackBrush(Color(255, 0, 0, 0));
        gr.DrawString(L"abcdefghijklmnop", 16, pFont, origin, &blackBrush);
        delete pFont;
#pragma pop_macro("new")

Mark Salsbery
Microsoft MVP - Visual C++

sold_out wrote:

I am behind a LAN that contains at least 200 computers

Mark Salsbery
Microsoft MVP - Visual C++