How to convert QString to char *

[rajeshs]

I want to use sscanf function ,

I am using this function as follows,

QString s=" " //Some data;

sscanf(s,format,value1,value2 ,...);

this shows error like can't convert QString to char *,

So i tried ,

(char*)(s.data()) this is returning only first characcter,

usage like this,

sscanf((char*)(s.data()),format,value1,value2 ,...);


How to convert QString to char *?

Please help me.

Thanks,
Rajesh.S

[jpn]

I'd rather use for example QTextStream instead of sscanf. But if you insist, How can I convert a QString to char* and vice versa ? (http://trolltech.com/developer/knowledgebase/faq.2007-01-30.9032238253/)

PS. QString to char* conversion has been discussed millions of times..

[rajeshs]

Sorry , I searched for that i didn't get, Please post that links,

Thanks,
Rajesh.S

[jpn]

What's wrong with the link to Trolltech Knowledgebase?

[rajeshs]

sory in that link i didn't get clear idea.

Thanks
Rajesh.S

[rajeshs]

Sorry I went wrong link,.

Now i got the correct code


QApplication app(argc, argv);
QString str1 = "Test";
QByteArray ba = str1.toLatin1();
const char *c_str2 = ba.data();
printf("str2: %s", c_str2);
return app.exec();


Thank you for your valuable reply.

Thanks,
Rajesh.S

[mtrpoland]

And what about:

qString.toStdString().c_str();
?

[wysota]

And what about:

qString.toStdString().c_str();
?

You're asking yourself for a segfault here if you intend to ever use the resulting char*. The std::string is a temporary object that will get destroyed immediately, so such a construction is useless. If you look at the example, it avoids creating a temporary variable. But if you avoid it, you can of course go through std::string, if you have STL support compiled into Qt.