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From:	"Mr. Veli Suorsa" <veli DOT suorsa AT surfeu DOT fi>
Newsgroups:	comp.lang.c,comp.os.msdos.djgpp,comp.lang.c++
Subject:	String substitution to another
Date:	Mon, 03 Dec 2001 13:20:35 -0800
Organization:	Oulu
Lines:	81
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi!

I need some advices.
Please, show me, how I can read text file and substitute one string to
another (e.g. 'christmas card' -> 'money') and save file again to same
name.

Here is an example C program to read text file lines, but what
substitute commands should I add to it? Or are there ready functions in
C++, too?


---
/* Program read lines from file */

#include <stdio.h>
#include <stdlib.h>
#include <process.h>

#define MAXLINELEN 110

int main( int argc, char *argv[] )
{
   char filename[85], strline[MAXLINELEN];
   int line = 0;
   FILE *fileptr;

   /* Test if given parameter */
   if ( argc != 2 )
   {
      printf( "\nGive data file name : " );
      gets( filename );
   }
   else
   {
      /* Copy parameter to filename */
      strcpy( filename, argv[1] );
   }

   /* Test if can read file */
   if ( ( fileptr = fopen( filename, "r" ) ) == NULL )
   {
      printf( "\nError: File: %s can't read.\n", filename );
      exit(0);
   }

   /* List file */
   printf( "\nFile: %s list :\n", filename );

   /* Read and list, while not end of file */
   while ( !feof( fileptr ) )
   {
      fgets( strline, MAXLINELEN, fileptr );
      printf( "%s", strline );

      /* Line counter */
      line++;
   }

   /* Close file */
   fclose( fileptr );

   printf( "\n***  Read: %d rows from file: %s.\n", line, filename );

   return 0;
}
---

Thanks in advance!

Veli Suorsa
---
"People must believe to the future to be able to live!"
********************************** J.V.Snellman, 1890.

Oulu, FINLAND
***   Suorsa Team Homepage   ***
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