Question

convert CString data to integer

Asked by: abi_a

HI,
     How to convert a CString data to int. Suppose I have

char* bytearray;
CString data;
CString CSbytearray(bytearray);
data = CSbytearray.Mid(1,4);

Now,I need data in integer format. Can anyone help.

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Asked On
2004-04-26 at 05:10:32ID20967528
Tags

cstring

,

convert

,

int

,

integer

Topic

Windows MFC Programming

Participating Experts
3
Points
500
Comments
14

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Answers

 

by: ZoppoPosted on 2004-04-26 at 05:20:24ID: 10917693

Hi abi_a,


if I understand correctly you have a string containing a number which you want to have as an 'int', correct?

for this you can use atoi function for this, i.e.

int num = atoi( (LPCTSTR)data );

hope that helps,

ZOPPO

 

by: akalmaniPosted on 2004-04-26 at 05:41:58ID: 10917826

Alternately you can also use
int iVal = 0;
sscanf((LPCTSTR)data, &iVal);

 

by: abi_aPosted on 2004-04-26 at 06:02:44ID: 10917983

hi,
 
For  int num = atoi( (LPCTSTR)data ); I get compiler error
cannot convert from 'class CString' to 'const char *'

for sscanf((LPCTSTR)data, &iVal); getting
'sscanf' : cannot convert parameter 1 from 'const unsigned short *' to 'const char *'

 

by: ZoppoPosted on 2004-04-26 at 06:19:39ID: 10918122

hm ... that's strange ... try these:

num = atoi( data );
num = atoi( (LPTSTR)data );

BTW, I find this is strange: LPCTSTR of a CString should always work since LPCTSTR
is a conversion operator of CString class in MFC

 

by: akalmaniPosted on 2004-04-26 at 06:23:28ID: 10918160

seems strange for me too..
maybe you can try this
sscanf(data.GetBuffer(data.GetLength()), &iVal);

 

by: vijay_visanaPosted on 2004-04-26 at 06:34:52ID: 10918263

can you show us some code

 

by: abi_aPosted on 2004-04-26 at 06:36:39ID: 10918281

Am getting same error.Iam coding in embedded vc++. Does that make any difference.

thanks

 

by: ZoppoPosted on 2004-04-26 at 06:45:58ID: 10918368

Well, I guess so ... I only found in MSDN that MFC for Windows CE CString has an operator LPCTSTR ...

maybe you can call it in another way, i.e. as function instead as operator
num = atoi( LPCTSTR( data ) );

Unfortunateley I have no further experience with embedded vc++, sorry ...

ZOPPO

 

by: abi_aPosted on 2004-04-26 at 06:48:59ID: 10918400

my code goes like this.....

CString data;
CString CSbytearray(bytearray);  // bytearray is a char array
data = CSbytearray.Mid(1,4);
 
In data I get something like 12 as a string. I need to convert it to int.

 

by: vijay_visanaPosted on 2004-04-26 at 07:02:55ID: 10918511



num = _ttoi((LPCTSTR)data);


or

TCHAR sz[1024];

lstrcpy(sz, data);
num =  _ttoi((LPCTSTR)data);



 

by: vijay_visanaPosted on 2004-04-26 at 07:03:55ID: 10918521

OPPSs...

TCHAR sz[1024];

lstrcpy(sz, data);
num =  _ttoi((LPCTSTR)sz);

 

by: akalmaniPosted on 2004-04-26 at 07:05:42ID: 10918544

Seems that CString is using UNICODE and the other functions we mentioned are just using ANSI
Last try from me since I too do not have any experience in eVC++

int iVal = 0;
_stscanf(data.GetBuffer(data.GetLength()), _T("%d"), &iVal);

Slight modification to Zoppo's solution, try something like this
iVal = _ttoi(data.GetBuffer(data.GetLength()));

 

by: akalmaniPosted on 2004-04-26 at 07:06:16ID: 10918552

Sorry too late in submission...did not refresh before submitting

 

by: abi_aPosted on 2004-04-26 at 07:22:25ID: 10918706


well     num = _ttoi((LPCTSTR)data);
  works fine

thanks very much

20120131-EE-VQP-002

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