Writing a specific program

[Albert]

how do i write a program that outputs its input if its input is more
than 80 characters?

[Madhav]

Albert wrote:

how do i write a program that outputs its input if its input is more
than 80 characters?

This sounds like homework. Please DO NOT expect someone to do your
homework. If you want any help, show us what you have done.

Madhav.

[moosdau]

use a loop to get input,
put the values into a buffer or a file,
when the input is over,
output the result.

[Chuck F.]

Albert wrote:

how do i write a program that outputs its input if its input is
more than 80 characters?

Read the input into a buffer. If it is over 80 chars long output
it, otherwise discard it.

If you can't express your needs accurately and unambiguously you
will have great difficulty in programming accurately.

--
"If you want to post a followup via groups.google.c om, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson
More details at: <http://cfaj.freeshell. org/google/>

[Nils O. Selåsdal]

Albert wrote:

how do i write a program that outputs its input if its input is more
than 80 characters?

What should it do if it's less than 80 characters ?

And what's 'input' ? Do you mean the entire input,
or are you dealing with line based text input, so you
mean 'what if a line is more than 80 characters' ?

[Niklas Norrthon]

"Albert" <al************ *****@gmail.com > writes:

how do i write a program that outputs its input if its input is more
than 80 characters?

#include <stdio.h>
#include <string.h>

int main(void)
{
char buf[100];
size_t sz;

sz = fread(buf, 1, sizeof buf, stdin);
if (sz > 80) {
do {
size_t r;
r = fwrite(buf, 1, sz, stdout);
if (r < sz) {
/* do error handling here */
}
sz = fread(buf, 1, sizeof buf, stdin);
} while (sz > 0);
}
return 0;
}

/Niklas Norrthon

[Kenny McCormack]

In article <11************ *********@g49g2 000cwa.googlegr oups.com>,
Albert <al************ *****@gmail.com > wrote:

how do i write a program that outputs its input if its input is more
than 80 characters?

length > 80

Yup, that's the whole program. Up to you to provide the necessary shell
wrappings, input and output files, etc.

[Malcolm]

"Albert" <al************ *****@gmail.com > wrote

how do i write a program that outputs its input if its input is more
than 80 characters?

Firstly you need a proper specification from your user.
Does he want the input from stdin, or from a file?
Does he mean "pass any lines longer than 80 characters" to stdout, or does
he want any file longer than 80 characters to be output (and where to).

Secondly, are there any restrictions on unusual inputs? For instance if a
line is 10GB, does the program have to pass it out? Can we assume files or
even lines will fit in memory? If the program runs out of memory, what is it
meant to do? Can it truncate long input? What if input contains non-ASCII
characters (including NULs)?

Once you've got answers to the above questions, you have your system
requirements, and you cna start coding, but most software engineers would
say not before (at least for beginners).

[Albert]

You're complete utter bullshit.
Have you ever bothered reading The C Programming Language by K&R
before? There's an exercise on this and I simply don't know how to do
it and you expect me to write what I've tried - never heard of such shit

[Richard Heathfield]

Albert said:

You're complete utter [expletive deleted].
Have you ever bothered reading The C Programming Language by K&R
before? There's an exercise on this and I simply don't know how to do
it and you expect me to write what I've tried - never heard of such
[expletive deleted]

You know something? I almost felt sorry for you. I almost gave you a long
reply explaining how to set about tackling a problem like this. Almost.

And then I looked again at your choice of words, and I thought about what
contempt you have for the readers of this newsgroup, that you are prepared
to throw expletives in their collective face, and I decided not to bother
after all.

When you're all growed up, ask again.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999
http://www.cpax.org.uk
email: rjh at above domain (but drop the www, obviously)