Subj : Re: index dependent filename
To   : borland.public.cpp.borlandcpp
From : "Dwayne" <myfrienddr@yahoo.com>
Date : Tue Oct 28 2003 11:22 am


        Hello Cory,

Cory >>I want to run a loop indexed by an integer (k) several times and
output the data to a different file with each loop.  Is there a way to write
print to file statements wth name that depend on the index (k)?  For example
how do I write "yahoo on (k)" to file yahoo_k.txt for each index (k).<<

      Here is a extremely simple one.
 I could have left out a couple of things, Like the FileNameMain. and
assignment of it,
but, if somewhere else in the program you assign your Base Name, you have a
idea how
it could be done.


#include <conio.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void main(void)
 {
  char FileName[15];
  char FileNameMain[15];
  char IntVal[4];
  int a;

  strcpy(FileNameMain,"Yahoo"); // Assign Base Name.
  for(a=1;a<10;a++)
 {
  itoa(a,IntVal,10);
// If you notice, I only allowed 14 characters for the filename This
includes the period AND the extension.
// though I declared the length of 15, you must add one character for the
NULL terminator.
// the same thing goes with the InvVal..you are only allowed up to a 3 digit
integer, 999 files.
// In a DOS format, you are allowed 8x3 file names.  this means a total of
12 characters.  So a length
// of 14 characters is plenty! <g>.  If you want longer filenames, better
increase the lengths of the strings.

//memset(FileName,'\0',strlen(FileName)); //I like making sure I am using a
null string. easier to debug too.

// This program will not create the files for you, but it will *make* the
filenames for you.  I don't want
// to give you a program that creates a bunch of garbage on your
computer...right?
  strcpy(FileName,FileNameMain); //Step one of creating index. assign Base.
  strcat(FileName,IntVal);               //Step two, add on integer that has
been converted to character
  strcat(FileName,".txt");                 //Step three, add your extension.

//  Here you open your file and do something with it
//  Open file,
//  do stuff
//  close file.
 }
 }

.