Problems with CString and fscanf

[Jose Luis Sogorb]

Why does this code work?: char test[12], test1[12]; ....more code... fscanf(fp,"%d %s %s %s %s",&hour,station,country,test,test1); And this doesn`t: CString test, test1; ....more code... fscanf(fp,"%d %s %s %s %s",&hour,station,country,test,test1); The CString values are correct just after the 'fscanf', but they disappear after some other function calls.

[Michael Dunn]

You are directly modifying the contents of the CString without locking the buffer first.

CString test, test1;
LPTSTR pszBuff, pszBuff1;

pszBuff = test.GetBuffer(12);
pszBuff1 = test1.GetBuffer(12);

Now you can use pszBuff/pszBuff1 in fscanf(). Call ReleaseBuffer() on both CStrings once you're done directly modifying the contents. --Mike-- My really out-of-date homepage "Why does anyone have a web page? Too much free time... not enough friends... justifying owning a computer." -- Noel Crane on Felicity Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan.

[Jose Luis Sogorb]

Thank you, so much. And then if I modify the values in many places, this way: if (...) test="some word", and so on... What must I do? Have I to make a GetBuffer before modifying it and ReleaseBuffer after each one?

[Michael Dunn]

José Luis Sogorb wrote: Have I to make a GetBuffer before modifying it and ReleaseBuffer after each one? Yep. See the docs on CString::GetBuffer() for some examples. --Mike-- My really out-of-date homepage "Why does anyone have a web page? Too much free time... not enough friends... justifying owning a computer." -- Noel Crane on Felicity Sonork - 100.10414 AcidHelm Big fan of Alyson Hannigan.