Re: Find Source SPRINTF.C

From:

David Wilkinson <no-reply@effisols.com>

Newsgroups:

microsoft.public.vc.language

Date:

Tue, 02 May 2006 21:51:40 -0400

Message-ID:

<OO2YaQlbGHA.3344@TK2MSFTNGP03.phx.gbl>

nik wrote:

I am debugging an application in VC 6.0 that can't find SPRINTF.C

I found two threads that said that the SRC must be installed for VC6 to
find this, but I do have a SRC folder under C:\Program Files\Microsoft
Visual Studio\VC98\MFC\SRC that doesn't include this file.

I noticed while searching my computer that the file does exist under VS
2005's SRC folder, so I am wondering if SPRINTF.C is part of VC6 or
not?

The code that this problem arises in is:

                char *pbstr = "test";
    pStringList.RemoveAll();
    for(int i = 0; i<10; i++)
    {
        sprintf(pbstr, _T("Live Data Test: %d /n"), i);
        pStringList.AddTail(LPCTSTR("Live Data Test Line") );
    }

Thank you

nik:

sprintf.c is part of the C runtime library, not MFC. You should find it in

C:\Program Files\Microsoft Visual Studio\VC98\CRT\SRC

Your error is because you are trying to write to pbstr, which is
pointing to read-only memory. That is why it is much better to always
write, for example

const char *pbstr = "test";

Then your sprintf() call would not compile. Actually your sprintf() call
serves no purpose (other than cause a run-time failure), because pbstr
is not used after the call. But CString::Format(), or
std::ostringstream/wostringstream are much safer ways to fill a buffer.

David Wilkinson