Very Computer

I write a program:

#include <stdio.h>
main()
{
   char str[81];
   while(1)
   {
      gets(str);
      printf("You input: %s\n",str);
   }

Quote:}

My question is why it causes infinitely loop after I press Ctrl-D.
Is there any solution about this?  Thanks.

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: #include <stdio.h>
: main()
: {
:    char str[81];
:    while(1)
:    {
:       gets(str);
:       printf("You input: %s\n",str);
:    }
: }

I think my question has a bit confusing.  My question is, if I want to
get a string again after the user press Ctrl-D.  What can I do?  It is
because after user press Ctrl-D and I ask for gets again, it will
return NULL again.  Sorry about that. Thanks.

--
     +------------------------------------------------------------+
    / \   Trying to maintain a good friendship with all people   / \
   /   + - - - - - - - - - - - - - - - - - - - - - - - - - - - -/ - +


+------------------------------------------------------------+   /
 \ /Home Page: http://susis.ust.hk/~enoch                     \ /
  +------------------------------------------------------------+

: I think my question has a bit confusing.  My question is, if I want to
: get a string again after the user press Ctrl-D.  What can I do?  It is
: because after user press Ctrl-D and I ask for gets again, it will
: return NULL again.  Sorry about that. Thanks.

man clearerror.

But you may need to check that the input is a terminal before you use
it and try and get more input. (Consider what will happen if the input
is coming from a file.)

--

Philips Semiconductors Ltd
Southampton                                 My views are my own.
United Kingdom

=> I think my question has a bit confusing.  My question is, if I want to
=> get a string again after the user press Ctrl-D.  What can I do?  It is
=> because after user press Ctrl-D and I ask for gets again, it will
=> return NULL again.  Sorry about that. Thanks.

        Try using the clearerr() function on stdin and then read
again.  It sets the EOF indicator back to zero.
--
Jason C. Austin

WWW:   http://gis-www.larc.nasa.gov/~jason