Re: A VC++ 2005 printf() question.

From:

"Mark Salsbery [MVP]" <MarkSalsbery[MVP]@newsgroup.nospam>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 29 Aug 2008 19:15:26 -0700

Message-ID:

<eWimJZkCJHA.4932@TK2MSFTNGP03.phx.gbl>

<quincy451@yahoo.com> wrote in message
news:5dffe4e3-eab4-4c55-969b-c7a7d7294d09@j22g2000hsf.googlegroups.com...

Ok I run the following program in VC++ 2005 and C++Builder 6.0 and I
get different results:
First the program:
int _tmain(int argc, _TCHAR* argv[])
{
HMODULE lib_handle;
int retval=1;

if (argc>1)
{
    lib_handle=LoadLibrary(argv[1]);
    if (lib_handle)
    {
       printf("LoadLibrary(%s) successful\n", argv[1]);
       if (argc>2)
       if (GetProcAddress(lib_handle, (LPCSTR)argv[2]))
printf("GetProcAddress(%s) successful\n", argv[2]);
       else
printf("GetProcAddress(%s) failed GetLastError()=%d\n", argv[2],
GetLastError());
       FreeLibrary(lib_handle);
       retval=0;
   }
   else
   {
       printf("LoadLibrary(%s) fails GetLastError()=%d\n", argv[1],
GetLastError());
       retval=1;
   }
   return(retval);
}
}

The microsoft VC 2005 output:
load_library_test microsoft_isdn.dll init_hardware
LoadLibrary(m) successful
GetProcAddress(i) failed GetLastError()=127

The more typicall borland output:
loadlibrary_test microsoft_isdn.dll init_hardware
LoadLibrary(microsoft_isdn.dll) successful
GetProcAddress(init_hardware) failed GetLastError()=127

My question: Why did microsoft only print the first character of the
string on the
(%s)?

I'm guessing the parameter strings are wchar_t and printf() expects char.

On VC, you can use the generic _tprintf() function to match the TCHAR type
of the commandline args regardless of Unicode or MBCS build.

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

Thanks,
David