From:	"Paul Bibbings" <paul DOT bibbings AT tesco DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: sprintf woes
Date:	Thu, 10 Feb 2000 03:26:03 -0000
Organization:	Tesco ISP
Lines:	55
Message-ID:	<87tbs3$ftl$1@epos.tesco.net>
References:	<87pssv$12f$1 AT nnrp1 DOT deja DOT com>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

The problem with your program is that you declare the pointers *f, *g, etc.,
but you don't associate any memory with these in which to store your
strings, and note that you need enough space to include the strings
themselves plus a terminating NULL character.
    Hence, for char *f use char f[2], and for char *j use j[7], etc. Your
program will then work properly. (See below).


<mrdang AT my-deja DOT com> wrote in message news:87pssv$12f$1 AT nnrp1 DOT deja DOT com...
> I am having a lot of trouble with sprintf.  I can not seem to make it
> do what I want within a subroutine / procedure.  As an example:


****************************************************************************

#include <stdio.h>

   void testing(void);

   int main()
   {
      char f[2], g[2], j[7];

      testing();
      testing();

      sprintf(f, "q");
      sprintf(g, "w");

      printf("%s\n", f);
      printf("%s\n", g);

      sprintf(j, "s: %s %s", f, g);
      printf("%s\n\n", j);

      return 0;
   }

   void testing()
   {
      char t[7], m[2], h[2];

      sprintf(m, "b");
      sprintf(h, "d");

      printf("%s\n", m);
      printf("%s\n", h);

      sprintf(t, "s: %s %s", m, h);
      printf("%s\n\n", t);
   }

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