reading from stdin

**matsp** · 02-05-2008

You should be able to do this using "select()", perhaps something like this:

Code:

bool checkifdata(FILE *f)
{
   int fno = fileno(f);
   fd_set fdset;
   FD_ZERO(fdset);
   FD_SET(fno, fdset);
   
   return select(fno+1, fdset, NULL, NULL, NULL);
}

Sorry if this is a late reply, but I got sidetracked.

--
Mats

**carlorfeo** · 02-05-2008

Originally Posted by King Mir

It says that in_avail calls showmanyc(). That function can check if underflow is possible, and return the number of available characters. However there is no requirement that cin implements this functionality; the default behavior is simply to return 0.

Ok thanks, I don't know what "underflow" means exactly, but I figured out what the matter is.

-----------------------------
select() seems to be the right way, checking it out...

Thread: reading from stdin

Thread Tools

Search Thread

Display

Hybrid View

Similar Threads

Checking stdin for input

stdin + (ctrl+z), how i detect it?

reading from stdin

Fun with reading hex

Array, reading in response etc...