Subj : Re: fstream arrays
To   : borland.public.cpp.borlandcpp
From : "Dwayne" <myfrienddr@yahoo.com>
Date : Tue Feb 24 2004 03:51 pm

          Hello D Kat,
/////////////////////CODE////////////////////////////////
ofstream out_files[NSUB];//file to write data to
get_subj_fp(int file)
{
  char name[20];

  strcpy(name,"data/");
  strcat(name, sub_name[file]);
  strcat(name,".");
  strcat(name,cdn);
  out_files[file].open(name);
  if (!out_files[file])
  {
  cerr << "\nerror on file " << sub_name[file] << "\n";
  return(1);
  }
  return(0);
}


      A few other things.

1.  Clear the variable "Name".  Assign it to all blanks I realize that
strcpy puts a NULL terminating character on the end of the copy, but it may
help in the debugging.
2.  make sure you use "Forward Slashes", not back slashes. in the "copy" and
"Cat" commands.  That way the compiler will not think it is a "special"
character... like \0.   or \\.
3.  This may sound crazy, but it may solve your problem.... Build your
string with a strins command.  Do not use the Strcat.  You may be building
it backwards from what you are doing, but hey! the result is the same....
4.  Are you using  something like Memcheck? There is a very good chance that
you are overwriting your memory someplace. and you may not be seeing it
until now.  Strcat is a dangerous command for overwriting memory if you are
not careful.

  strcpy(name,"data/");
  strcat(name, sub_name[file]);
  strcat(name,".");
  strcat(name,cdn);

      changes to:
strcpy(name,cdn);
strins(".",name,0);
strins("sub_name[file],name,0);
strins("data/",name,0);

Here is a source for a strins....

int strins(char *r, char *s, int p)
 {
  int c,d;
  d=0;
  c=-1;
  while(d<strlen(r))// don't use <=, it will inc. null
  {
  for(c=strlen(s);c>=p+d;c--)
 {
  *(s+c+1)=*(s+c);
 }
  *(s+p+d)=*(r+d);
  d++;
  c=0;
  }
  return(c);
 };

.