SV: [LC++]NEWBIE: what is errno

[Carlo Wood]

On Fri, Sep 21, 2001 at 12:08:11PM +0200, Jarmo Paavilainen wrote:
> Hi,
> 
> "man errno" gives you all the answers you need.
> 
> Basic usage is:
> 
> #include <errno.h>
> #include <stdio.h>
> 
> ...Do something that sets errno...
> 
> printf( "errno is: %d %s\n", errno, strerror( errno ));
> 
> // Jarmo

Shouldn't he subscribe to the C-programming mailinglist?

If you're coding C++, the basic usage is:

#include <cerrno>		// Defines macro errno
#include <cstring>		// Defines std::strerror
#include <iostream>

...Do something that sets errno...

  std::cout << "errno is: " << errno << ' ' << std::strerror(errno) << '\n';

-- 
Carlo Wood <carlo at alinoe.com>