Having Trouble

[ext_u]

I'm trying to learn C from "The C Programming Language" (by K&R) and I
am about halfway through the first chapter.

I am using Miracle C as my text editor and compiler.

Up until this point everything was working fine, but now the book has
started into Line and Word counting programs. I am entering the
programs into the text editor exactly like they are in the book and
they are not working right at all. They compile fine and when I run
them they do no produce any output like they should be. Its strange.
I think it may be my compiler. Someone recommended my using DJPGG (i
think it was called) and I tried to install and run that program but
it seems way way way to complicated for me and I have noone who can
show me how to get it to run properly.

This is the line counting Prog:
#include <stdio.h>
main()
{
int c, nl;
nl = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
printf("%d\n", nl);
}

When I type things into the cmdprompt it will not give me any output (
i guess its called) Its almost like the printf cmd isnt there and it
is just taking in the data and not displaying anything. The word
counting program was basically the same and gave me the same result.
I enter something , hit enter and instead of printing anything on the
screen it pauses for a moment and then moves down to the next line.
Its frustrating. There is also wc program that comes straight from
UNIX in the book and when I enter the code exactly as it is in the
book into my compiler I get a weird error like it thinks the word OUT
is the number 0. Very strange....

I think the problem is my compiler. Can anyone recommend a good and
easy to use C compiler/text editor??

[Tor Hildrum]

ext_u wrote:

This is the line counting Prog:
#include <stdio.h>
main()
{
int c, nl;
nl = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
printf("%d\n", nl);
}

int main(void)
{
int nl;
char c;
nl = 0;

while( (c = getchar() ) != EOF)
{
if( c == '\n')
++nl;
}

printf("%d\n", nl);

return 0;
}

This type of program takes the input-file on standard input, so you
basically need to redirect a file to your program.

Example:
[hildrum:C-Programming] tor% wc -l linecount.c
18 linecount.c
[hildrum:C-Programming] tor% ./linecount < linecount.c
18

Tor

[Matt Gregory]

ext_u wrote:

I'm trying to learn C from "The C Programming Language" (by K&R) and I
am about halfway through the first chapter.

I am using Miracle C as my text editor and compiler.

Up until this point everything was working fine, but now the book has
started into Line and Word counting programs. I am entering the
programs into the text editor exactly like they are in the book and
they are not working right at all. They compile fine and when I run
them they do no produce any output like they should be. Its strange.
I think it may be my compiler. Someone recommended my using DJPGG (i
think it was called) and I tried to install and run that program but
it seems way way way to complicated for me and I have noone who can
show me how to get it to run properly.

This is the line counting Prog:
#include <stdio.h>
main()
{
int c, nl;
nl = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
printf("%d\n", nl);
}

When I type things into the cmdprompt it will not give me any output (
i guess its called) Its almost like the printf cmd isnt there and it
is just taking in the data and not displaying anything. The word
counting program was basically the same and gave me the same result.
I enter something , hit enter and instead of printing anything on the
screen it pauses for a moment and then moves down to the next line.
Its frustrating. There is also wc program that comes straight from
UNIX in the book and when I enter the code exactly as it is in the
book into my compiler I get a weird error like it thinks the word OUT
is the number 0. Very strange....

I think the problem is my compiler. Can anyone recommend a good and
easy to use C compiler/text editor??

No, the program is right. It's waiting for you to signal an EOF.
Control-Z should work for DOS. You might have to hit enter.

That program would work better by sending a file for it to read.

prog.exe < file.txt

Read about command output redirection, filters, and pipes somewhere.
I don't know of a good overview offhand, but it's some fundamental
knowledge.

[Bill Reed]

On 17 Aug 2003 18:19:07 -0700, ex***********@h otmail.com (ext_u)
wrote:

I'm trying to learn C from "The C Programming Language" (by K&R) and I
am about halfway through the first chapter.

I am using Miracle C as my text editor and compiler.

Up until this point everything was working fine, but now the book has
started into Line and Word counting programs. I am entering the
programs into the text editor exactly like they are in the book and
they are not working right at all. They compile fine and when I run
them they do no produce any output like they should be. Its strange.
I think it may be my compiler. Someone recommended my using DJPGG (i
think it was called) and I tried to install and run that program but
it seems way way way to complicated for me and I have noone who can
show me how to get it to run properly.

This is the line counting Prog:
#include <stdio.h>
main()
{
int c, nl;
nl = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
printf("%d\n", nl);
}

Your problem might be that you need a text file in the same directory
as your executable. Just type a few lines in a new text file or copy a
readme file from somewhere. Then on the command line enter:

"program_na me" < "text_file_name "

then your program will count the number of lines.

I believe this is your problem.

Bill

Bill Reed
Email = Subject: must include "clc"

[Steve Zimmerman]

ext_u wrote:

I'm trying to learn C from "The C Programming Language" (by K&R) and I
am about halfway through the first chapter.

I am using Miracle C as my text editor and compiler.

Up until this point everything was working fine, but now the book has
started into Line and Word counting programs. I am entering the
programs into the text editor exactly like they are in the book and
they are not working right at all. They compile fine and when I run
them they do no produce any output like they should be. Its strange.
I think it may be my compiler. Someone recommended my using DJPGG (i
think it was called) and I tried to install and run that program but
it seems way way way to complicated for me and I have noone who can
show me how to get it to run properly.

This is the line counting Prog:
#include <stdio.h>
main()
{
int c, nl;
nl = 0;
while ((c = getchar()) != EOF)
if (c == '\n')
++nl;
printf("%d\n", nl);
}

When I type things into the cmdprompt it will not give me any output (
i guess its called) Its almost like the printf cmd isnt there and it
is just taking in the data and not displaying anything. The word
counting program was basically the same and gave me the same result.
I enter something , hit enter and instead of printing anything on the
screen it pauses for a moment and then moves down to the next line.
Its frustrating. There is also wc program that comes straight from
UNIX in the book and when I enter the code exactly as it is in the
book into my compiler I get a weird error like it thinks the word OUT
is the number 0. Very strange....

I think the problem is my compiler. Can anyone recommend a good and
easy to use C compiler/text editor??

I like the gcc compiler, which comes with the Linux
operating system. Here's how the program works with
gcc. (I've numbered the lines, so I can explain what
they mean.)

(1) gcc line_count.c -o line_count
(2) ./line_count
(3) The quick brown fox
(4) jumped over the
(5) gnarly net.
(6) Control-d
(7) 3

You type lines 1 and 2 into the computer.
Then you can type however many lines you want,
and then type Control-d, and the computer will
tell you how many lines you just entered into
the computer (minus the Control-d line).

[CBFalconer]

ext_u wrote:

I'm trying to learn C from "The C Programming Language" (by K&R) and I
am about halfway through the first chapter.

I am using Miracle C as my text editor and compiler.

Up until this point everything was working fine, but now the book has
started into Line and Word counting programs. I am entering the
programs into the text editor exactly like they are in the book and
they are not working right at all. They compile fine and when I run
them they do no produce any output like they should be. Its strange.
I think it may be my compiler. Someone recommended my using DJPGG (i
think it was called) and I tried to install and run that program but
it seems way way way to complicated for me and I have noone who can
show me how to get it to run properly.
.... snip ...
I think the problem is my compiler. Can anyone recommend a good and
easy to use C compiler/text editor??

You didn't follow instructions on the DJGPP installation. It is
NOT a program, it is a system. Among other things you will get
gcc, the best C compiler available, and pretty well universally
used. Go through the sip-picker again, and be sure to get unzip32
with it, and to follow instructions.

--
Chuck F (cb********@yah oo.com) (cb********@wor ldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net> USE worldnet address!

[Nils Petter Vaskinn]

On Sun, 17 Aug 2003 18:19:07 -0700, ext_u wrote:

while ((c = getchar()) != EOF) When I type things into the cmdprompt it will not give me any output

This program reads until it gets to an EOF (end of file) character, so
unless you supply one it won't ever complete.

In linux ctrl-d (I think it was) makes and EOF character, don't know if
that works in windows but it may be worth a try. If it doesn't you'll have
to search the documentation to figure out how to input and EOF character

hth
NPV

[Arjan]

In message <4aW%a.23577$KF 1.317975@amstwi st00>
Tor Hildrum <to*@hildrum.ne t> wrote:

int main(void)
{
int nl;
char c;
Doesn't getchar() return an int?
nl = 0;

while( (c = getchar() ) != EOF)
{
if( c == '\n')
++nl;
}

printf("%d\n", nl);

return 0;
}

Groeten,
Arjan

[Jan Engelhardt]

>> while ((c = getchar()) != EOF)

When I type things into the cmdprompt it will not give me any output
In linux ctrl-d (I think it was) makes and EOF character, don't know if

it was.
that works in windows but it may be worth a try. If it doesn't you'll have

sometimes. otherwise try ctrl-z. if that doesnot work too, I can't help either.
--
- Jan Engelhardt

[Keith Thompson]

"Nils Petter Vaskinn" <[e-mail] .invalid> writes:

On Sun, 17 Aug 2003 18:19:07 -0700, ext_u wrote:

while ((c = getchar()) != EOF)

When I type things into the cmdprompt it will not give me any output

This program reads until it gets to an EOF (end of file) character, so
unless you supply one it won't ever complete.

Quibble: EOF is not a character, it's a macro that expands to a
negative integer constant expression ((-1) is typical). That's why
getchar() returns an int rather than a character type, so it can
return either a character value or EOF.

Just to add to the confusion, many systems use a specific input
character to signal an EOF condition for interactive input.

<OT>
Unix-like systems typically use control-D, but a program reading from
the keyboard will see an EOF condition, not a control-D character
('\004') -- though a mechanism exists for entering a control-D
character so that it will be seen by the reading program, *without*
triggering an EOF condition (control-V control-D). A control-D
character in a disk file will be read as a '\004' character, and will
*not* signal EOF. Other systems may behave differently; for example,
I think that a control-Z character ('\026') in an MS-DOS text file
actually does signal EOF.
</OT>

--
Keith Thompson (The_Other_Keit h) ks*@cts.com <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://www.sdsc.edu/~kst>
Schroedinger does Shakespeare: "To be *and* not to be"