Using printf with CString

[Japhy1]

Hi, a simple question.

I'm try to use the printf function with CStrings in a Win32 Console application. I've already included MFC support. Since the printf function accepts const char * variables, I'm getting an error when I try something like.

CString s = "this is a test";
printf(s);

Is there another function or a conversion that will left me print CString variables to the console?

Thanks in advance for your help.

 

[cpjust]

CString sucks. I'd use STL strings.
However, I believe you can fix your problem by calling the GetString() or GetBuffer() methods of CString.

 

[Japhy1]

both GetBuffer() and GetString() return a const wchar_t * which still doesn't work with printf, unfortunately.

You're right, CString is really starting to get on my nerves but I have to use it temporarily for this project.

 

[Japhy1]

I got it to work by doing this...

CString s = "This is a test";
CT2CA pszConvertedAnsiString (s);
std::string strStd (pszConvertedAnsiString);
printf("%s", strStd.c_str());

not very elegant but it works...

 

[Salem]

> both GetBuffer() and GetString() return a const wchar_t * which still doesn't work with printf,
Well it might, if you used

printf("%S", s.GetString() );  // note the CAPS 'S'

> printf(s);
Never pass an unknown string as the control string to any of the variadic functions. Just one unexpected '%' in there, and the code is in a world of trouble before you can say 'segfault'.


--
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.

 

[Japhy1]

yes, that works too...thanks for the response and for the pseudo-esoteric warning.

 

[xwb]

This will work for both MBCS and Unicode

_tprintf (_T("%s"), (LPCTSTR) s);