C++/VB - No _ttof in Visual Studio 2008

Asked By Oliver Regenfelder

21-May-10 06:15 AM

Hello,

Is there no _ttof function in Visual Studio 2008,
or do I need to include some special header file?

I get: error C3861: '_ttof': identifier not found

I use Visual Studio 2008, in a non unicode build.
The codebase originates from VS6.


Best regards,

Oliver

21-May-10 06:20 AM

Oliver,

Have you included tchar.h ?

Dave

21-May-10 06:25 AM

In <tchar.h> of VS2008 SP1, I can find:


(but not _ttof...)

Giovanni

21-May-10 06:31 AM

In <tchar.h> of VS2008 SP1, I could find _tstof, but not _ttof.
But it seems that the related MSDN web page lists both forms (_tstof and
_ttof) of TCHAR-mapping:

http://msdn.microsoft.com/en-us/library/hc25t012(VS.90).aspx

Instead, the <tchar.h> included in VS2010 does have both _ttof and _tstof
mapping.

...Seems like a bug in VS2008's <tchar.h> ?

Giovanni

21-May-10 11:08 AM

Hello,


Good so I am not the only one who expected it to work.


I changed all occurences of atof to _tstof and also changed all _ttoi
to _tstoi just to use the same prefix style everywhere. Thanks for
pointing out _tstof.

BTW, is there any difference between the _t and _ts family e.g.
_ttoi and _tstoi? Accoriding to the documentation, they are all mapped
the same way.

Best regards,

Oliver

21-May-10 02:50 PM

There is none.  There was no _ttof in VS6 at all, and in VS.NET it was named, suprisingly,
_tstof (check the docs!  Look under _atof).  Yes, the naming is inconsistent.  No, there
is no sensible reason for having done this.  But it is what we are stuck with.
joe


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21-May-10 03:22 PM

Hello,


Horribly they mention _ttof on the following page (VS2008):
http://msdn.microsoft.com/en-us/library/hc25t012%28VS.90%29.aspx

and it is also mentioned on
http://www.flounder.com/cstring.htm#Converting%20a%20CString%20to%20a%20double

maybe this should be updated?

Best regards,

Oliver