NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/lang/c++-part1/348

Text File | 1996-08-05 | 1.6 KB | 57 lines

Path: rose_ip167.efn.org!peterf
From: [e-mail] (Peter F.)
Newsgroups: comp.lang.c++
Subject: Binaries
Date: Tue, 2 Jan 1996 23:18:34
Organization: Southern Oregon Unified Networking District (SOUND)
Message-ID: <[e-mail]>
NNTP-Posting-Host: rose_ip167.efn.org
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Dear Friends,

I have been working on a c++ program, where the goal is to imitate the dos
copy command.  I have been writing this program, and it works eccept for one
small thing.  When I read a file, say 29,300 bytes and then want to output
that file to a new directory, the files always come out 1 byte larger (ex.
29,301).  I dont know where the extra byte is coming from? Here is the code
and maybe you could find the problem....

#include <stdio.h>

void main(void)
 {
   FILE *in, *out;

   if ((in = fopen("C:\\car.pcx", "rb"))== NULL)
    {
     fprintf(stderr, "Cannot open input file.\n");
    }

   if ((out = fopen("C:\\temp\\car.pcx", "wb"))== NULL)
    {
     fprintf(stderr, "Cannot open output file.\n");
    }

   while (!feof(in))
    { fputc(fgetc(in), out); }

   fclose(in);
   fclose(out);
 }

I compiled this code, and when I tried to view the car.pcx file in the temp
dir. it was the same image, but the colors had changed.  I am worried with
this extra byte that it may mess up .exe or .dll files when copied.
Also if anyone knows how to access Dos commands like copy or move from C++
this could help also.  I use BC++ 3.1.

P.S. -- Anyone know how the copy command works, like how it keeps the same
date, time, file size, of the target file you copied from.

Thanks,

Peter Felten

[e-mail]