Path: csiph.com!eternal-september.org!feeder.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: while loop vs do while loop reading from the file issue
Date: Fri, 09 Dec 2016 11:40:28 -0800
Organization: None to speak of
Lines: 63
Message-ID: <lnoa0kyjpv.fsf@kst-u.example.com>
References: <52f1c174-6af1-4fda-9ff8-a5e2cf507b5f@googlegroups.com> <o29hq3$c7p$1@dont-email.me> <o29i1r$cfv$1@dont-email.me> <o29id9$egc$1@dont-email.me> <ihng4clp2cjofv1ggvdfu0oqqiglsu9u6f@4ax.com> <o29ocj$519$1@dont-email.me> <5d94897b-fedc-4a28-81d0-3579e9bf754d@googlegroups.com> <o2b2dn$on2$1@dont-email.me> <4d53f1c5-b622-4425-9dfe-694c42676cae@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Injection-Info: mx02.eternal-september.org; posting-host="2ad4785427d430f26583540ef5e88668"; logging-data="8777"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+3HdNwSwhQdO3McCCN6EZH"
User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux)
Cancel-Lock: sha1:/XqNeponJ+gwzV0zEcY1NkZgX/U= sha1:L/J6B3gEbob/e25kv/eQK+MRgfE=
Xref: csiph.com comp.lang.c:98603

Alla _ <modelling.data@gmail.com> writes:
[...]
> ( I ) two original programs: one creates a file, another reads from that file. 
>
> // Fig. 11.2: fig11_02.c
> // Creating a sequential file
>
> #include <stdio.h>
>
> int main( void )
> {
>     unsigned int account; // account number
>     char name[ 30 ]; // account name
>     double balance; // account balance
>     
>     FILE *cfPtr; // cfPtr = clients.csv file pointer
>     
>     // fopen opens file. Exit program if unable to create file
>     if ( (cfPtr = fopen( "clients.csv", "w")) == NULL )
>     {
>         puts( "File could not be opened" );
>     } // end if
>     else
>     {
>         puts( "Enter the account, name, and balance." );
>         puts( "Enter EOF to end input." );
>         printf( "%s", "? " );
>         scanf( "%d%29s%lf", &account, name, &balance );
>         
>         // write account, name and balance into file with fprintf
>         while ( !feof( stdin ) )
>         {
>             fprintf( cfPtr, "%d %s %.2f\n", account, name, balance );
>             
>             /**
>              fprintf( stdout, "%d %s %.2f\n", account, name, balance );
>              to print the data to the standard output
>              **/
>             
>             printf( "%s", "? " );
>             scanf( "%d%29s%lf", &account, name, &balance );
>         } // end while
>         
>         fclose( cfPtr ); // fclose closes file
>         
>     } // end else
> } // end main

[...]

I have one very specific question about this.

Does the sample program in Deitel&Deitel actually use
"while ( !feof( stdin ) )"?

If so, though I'd hesitate to judge an entire book based on one
line of code, that in particular is a strike against this one.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"