Problem when Converting from CString to int

[arunkr6]

I am new on Using with dotnet platform. Previously I have Experience on working with VC++ 6.0.
On this exp, I hav choose VC++.Net for my current Project... By understanding the UNICODE fromats, I was going on right way(Extremely with the helps of CodeGuru team)

Here I am receiving some Datas from an Extenal PC Board via Serial Port.
The Data Receiving as ASCII format and I have stored it on a CString FirstData.
The following codes explains it.

CString FirstData;// already declared and here reads Data from Serial Port
for(int i=0;i<FirstData.GetLength();i++)
{
   int ibyte;
   CString ll;
   ll=FirstData.GetAt(i);
   sscanf(ll,"&#37;x",&ibyte)
}

Here I wanna convert this CString value ll to an int Hex Format and print it on a file....
But it is not working here.error Message came as "Cannot convert parameter 1 from CString to const char*.

Next I have changed sscanf as

_stscanf(ll,_T("%x),&ibyte);

It has worked...But when I read the data ibyte..it is wrong(some error datas are printed)
Again I used atoi function--still error values came.
How do I convert the exact data to an int Format.plz help...

[VictorN]

Sure, "char cannot be convert to a char* (as well as any other object cannot be converted to its pointer!)
You must understand:
1. CString::GetAt() returns NOT a string but a single character (char)
2. Use sscanf in MFC - is nonsense! There are more simple and appropriate functions, such as _ttoi, _tcstoul, _tcstol
3. All these convertion functions require a pointer to the buffer containing text to convert, so if you need/want to convert only one character you can use CString::Mid to extract a substring with only this one character:

CString FirstData;// already declared and here reads Data from Serial Port
for(int i=0;i<FirstData.GetLength();i++)
{
   int ibyte = _ttoi( FirstData.Mid(i, 1));
}

[arunkr6]

thank u VictorN,

further, if I want to write this ibyte on a file...
Can I use fprintf function????

[VictorN]

Well, if you want to ignore MFC advantages (CFile, CStdioFile classes) then yes, of course you can use fprintf function.

[arunkr6]

Thank u...

The error solved bt on printing in file, I've coded as

_ftprintf(file1,_T("%.2X"),ibyte);

each data printed as 0 only.. not the exact converted forms of getting values in CString.

So I've confirmed the ibyte value by formatted on CString.Since all the values are 0 only..
wy so?? I'm confused!!!!!

[VictorN]

Perhaps, you are printing the only 2 high bytes os ibyte?

Well, the main question is: what are you trying to do and why do do it so complicated?

CString FirstData;// already declared and here reads Data from Serial Port
for(int i=0;i<FirstData.GetLength();i++)
{
   _ftprintf(file1,_T("%.2X"), FirstData[i]);
}