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istringstream reusing initializing

Unity

Started by Black Knight Aug 13, 2007 at 5:52 AM 3 replies 2.9k views

Original Post

Black Knight

116

Black Knight

Aug 13, 2007 at 5:52 AM

linky Well it was asked long ago and it was unanswered. So what i want to do is : std::istringstream istr; //get a string from an edit box istr.str(myString); istr>>someinteger; //get another string from another editbox istr.str(myString); istr>>anotherInt; I couldn't find a way to do this other than using different istringstreams and creating them with the constructor like std::istringstream istr(myString); Any help?

dalleboy

Aug 13, 2007 at 6:08 AM

Add a call to istr.clear().

SiCrane

Mod

473

SiCrane

Aug 13, 2007 at 6:14 AM

Or just use boost::lexical_cast which avoids this kind of error.

EnergyTurtle

Aug 13, 2007 at 6:28 AM

Quote:
Original post by dalleboy
Add a call to istr.clear().

Bingo. There isn't a problem with your call to str(string). The internal string object is being updated, but the error bits aren't being reset. clear() does just that.

Zahlman

257

Zahlman

Aug 13, 2007 at 10:20 AM

Quote:
Original post by Black Knight
I couldn't find a way to do this other than using different istringstreams and creating them with the constructor like std::istringstream istr(myString);

Well, is it really a problem to do that? Usually this kind of thing happens in a loop, so you can just put this construction at the top of the loop.

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