From: Robert C. Duvall <rcd@cs.duke.edu>
  To  : 
  Date: 15 Feb 1999 17:58:46 -0500

Re: itoa

> > Is it defined in the g++ library? If yes, then how to use it (I tried the
> > man pages, nothing exists for itoa). If no, then is there a function to
> > convert integer to string?
> 
> To convert an int to a string, use the function sprintf.  For example,
> if num is a int in your program:
> 
>   string numStr;
>   sprintf(numStr.c_str(), "%d", num);

I sit corrected.  In C++, a better way to convert an int to a string
is to use an ostrstream.  So, a better way to do the example above is:

  ostrstream ost;
  ost << num;
  string str = ost.str();

This is better for at least one reason, it allows for standard stream
formatting:

  ostrstream ost;
  ost << setw(4) << num;
  string str = ost.str();


Hope this helps,
rcd

Quick quiz for wednesday: explain a more fundamental reason as to why
the first example is grossly wrong.

-- 
Robert C. Duvall
Lecturer, Duke University
rcd@cs.duke.edu