flowchart

[sameer]

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

[Joachim Schmitz]

Re: flowchart

sameer wrote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

homework alert!

Try it yourself first and show what you tried and were you got stuck

Bye, Jojo

[Chris Dollin]

Re: flowchart

sameer wrote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

What benefit do you expect to gain from a flowchart?

Displaying all prime numbers less than some N is trivial. It's /not/
displaying /composite/ numbers that's hard ...

--
"It would have to be enough." /Brokedown Palace/

Hewlett-Packard Limited Cain Road, Bracknell, registered no:
registered office: Berks RG12 1HN 690597 England

[santosh]

Re: flowchart

sameer wrote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

What exactly do you expect from this post? Have you made an attempt
yourself? If so, post your code, however incomplete or ugly it may be.
I suppose you do know what prime numbers are? How would you solve the
second part of your problem with a pen and paper? Your maths textbook
should have algorithms for doing this. Try implementing them in C.

[Eric Sosman]

Re: flowchart

sameer wrote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

Flowcharts are difficult in monospaced text, so I'll leave
that part to you. Here's the program, though, with error- and
sanity-checking omitted for brevity:

#include <stdio.h>
int main(void) {
unsigned int limit;
unsigned int value;
printf ("Number, please? ");
fflush (0);
scanf ("%u", &limit);
printf ("The prime numbers less than %u "
"are listed below:\n", limit);
for (value = 2; value < limit; ++value)
printf ("\t%u\n", value);
printf ("... along with a few false positives.\n");
return 0;
}

--
Eric Sosman
esosman@ieee-dot-org.invalid

[santosh]

Re: flowchart

Eric Sosman wrote:

sameer wrote:

>1-develop a flowchart and then write a c program to display all prime
>number less than the number entered by the user.

>
Flowcharts are difficult in monospaced text, so I'll leave
that part to you. Here's the program, though, with error- and
sanity-checking omitted for brevity:
>
#include <stdio.h>
int main(void) {
unsigned int limit;
unsigned int value;
printf ("Number, please? ");
fflush (0);

Can you tell me why you're using 0 instead of stdout?

scanf ("%u", &limit);
printf ("The prime numbers less than %u "
"are listed below:\n", limit);
for (value = 2; value < limit; ++value)
printf ("\t%u\n", value);
printf ("... along with a few false positives.\n");
return 0;
}
>

[Walter Roberson]

Re: flowchart

In article <g2os8n$oq1$1@r egistered.motza rella.org>,
santosh <santosh.k83@gm ail.comwrote:

>Eric Sosman wrote:

>printf ("Number, please? ");
>fflush (0);

>Can you tell me why you're using 0 instead of stdout?

$ man fflush
When calling fflush, if stream is a null pointer, all files open for
writing only and all files open for update whose last operation was a
write are flushed.

--
"There is nothing so bad but it can masquerade as moral."
-- Walter Lippmann

[Harald van =?UTF-8?b?RMSzaw==?=]

Re: flowchart

On Wed, 11 Jun 2008 16:08:51 +0000, Walter Roberson wrote:

In article <g2os8n$oq1$1@r egistered.motza rella.org>, santosh
<santosh.k83@gm ail.comwrote:

>>Eric Sosman wrote:

>

>>printf ("Number, please? ");
>>fflush (0);

>

>>Can you tell me why you're using 0 instead of stdout?

>
$ man fflush
When calling fflush, if stream is a null pointer, all files open
for writing only and all files open for update whose last operation
was a write are flushed.

That means fflush(0) is valid, not that it's a good idea. In this case, I
don't see the benefit to fflush(0) either, so I'm also curious for the
reason behind it.

[Eric Sosman]

Re: flowchart

Walter Roberson wrote:

In article <g2os8n$oq1$1@r egistered.motza rella.org>,
santosh <santosh.k83@gm ail.comwrote:

>Eric Sosman wrote:

>

>>printf ("Number, please? ");
>>fflush (0);

>

>Can you tell me why you're using 0 instead of stdout?

>
$ man fflush
When calling fflush, if stream is a null pointer, all files open for
writing only and all files open for update whose last operation was a
write are flushed.

"What he said." And my purpose was obfuscatory deviltry,
with a sneaking hope that it might survive all the way into
the O.P.'s homework submission, where it would likely elicit
santosh's question from the O.P.'s instructor and cause him
a well-deserved dose of embarrassment ...

--
Eric.Sosman@sun .com

[Keith Thompson]

Re: flowchart

Eric Sosman <Eric.Sosman@su n.comwrites:

Walter Roberson wrote:

>In article <g2os8n$oq1$1@r egistered.motza rella.org>,
>santosh <santosh.k83@gm ail.comwrote:

>>Eric Sosman wrote:

>>

>>>printf ("Number, please? ");
>>>fflush (0);

>>

>>Can you tell me why you're using 0 instead of stdout?

>$ man fflush
> When calling fflush, if stream is a null pointer, all files open for
> writing only and all files open for update whose last operation was a
> write are flushed.

>
"What he said." And my purpose was obfuscatory deviltry,
with a sneaking hope that it might survive all the way into
the O.P.'s homework submission, where it would likely elicit
santosh's question from the O.P.'s instructor and cause him
a well-deserved dose of embarrassment ...

Which won't happen now that you've admitted it in public. Oh, well.

Next time, consider fflush(L'\0').

--
Keith Thompson (The_Other_Keit h) kst-u@mib.org <http://www.ghoti.net/~kst>
Nokia
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"

[CBFalconer]

Re: flowchart

Eric Sosman wrote:

Walter Roberson wrote:

>santosh <santosh.k83@gm ail.comwrote:

>>Eric Sosman wrote:
>>>
>>>printf ("Number, please? ");
>>>fflush (0);
>>>
>>Can you tell me why you're using 0 instead of stdout?

>>
>$ man fflush
> When calling fflush, if stream is a null pointer, all files
> open for writing only and all files open for update whose
> last operation was a write are flushed.

>
"What he said." And my purpose was obfuscatory deviltry, with
a sneaking hope that it might survive all the way into the
O.P.'s homework submission, where it would likely elicit
santosh's question from the O.P.'s instructor and cause him a
well-deserved dose of embarrassment ...

An elegant objective, and quite possibly achieved, since the guilty
student has not reappeared, and so may have taken your method and
submitted it.

--
[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <http://cbfalconer.home .att.net>
Try the download section.


** Posted from http://www.teranews.com **

[rahul]

Re: flowchart

On Jun 11, 11:44 am, sameer <pawan.prajapat i...@gmail.comw rote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

Try Sieve of Eratosthenes.

http://en.wikipedia.org/wiki/Sieve_of_Eratosthenes

<weird>
You are using this as a homework forum and everyone is responding.
</weird>

[Chris Dollin]

Re: flowchart

rahul wrote:

On Jun 11, 11:44 am, sameer <pawan.prajapat i...@gmail.comw rote:

>1-develop a flowchart and then write a c program to display all prime
>number less than the number entered by the user.

>
Try Sieve of Eratosthenes.

http://en.wikipedia.org/wiki/Sieve_of_Eratosthenes

<weird>
You are using this as a homework forum and everyone is responding.
</weird>

As a wise Narn said, "not all replies are answers".

--
"I am trying to say that you have no choice." /The Courts of Chaos/

Hewlett-Packard Limited Cain Road, Bracknell, registered no:
registered office: Berks RG12 1HN 690597 England

[Antoninus Twink]

Re: flowchart

On 11 Jun 2008 at 6:44, sameer wrote:

1-develop a flowchart and then write a c program to display all prime
number less than the number entered by the user.

#include <stdio.h>
#include <gmp.h>

int main(int argc, char **argv)
{
int status=0;

if(argc>1) {
mpz_t n,p;
mpz_init_set_si (p, 2);
if(mpz_init_set _str(n, argv[1], 10)==0) {
while(mpz_cmp(p , n) <= 0) {
mpz_out_str(std out, 10, p);
puts("");
mpz_nextprime(p ,p);
}
} else {
fputs("Invalid argument\n", stderr);
status=1;
}
mpz_clear(n);
mpz_clear(p);
} else {
fprintf(stderr, "Usage: %s n\nPrints the primes <= n\n", *argv);
status=2;
}
return status;
}

[Don]

Re: flowchart

On Jun 11, 1:44 am, sameer <pawan.prajapat i...@gmail.comw rote:

1-develop a flowchart and then write a c program to display allprime
number less than the number entered by the user.

#include <stdio.h>

/* This program implements a blindingly fast O(n^n) algorithm
to find prime numbers, using an elegant recursive method. */
int _(int n, int m, int d, int t=0)
{
int r;
if (t) return d?1+_(n,m,d-1,d):n?_(n-1,m,m,n):0;
for(r=m!=n; d*(t<n); ++t)
r &= _(n,_(t,m,0,1), d-1)|!_(t,1,t);
return r*n;
}


/*------------------------------------------
Print primes up to the requested value
--------------------------------------------*/
int main(int argc, char* argv[])
{
int n,m;
scanf("%d",&m);
for(n = 2; n <= m; n++)
printf("%d is%s prime\n",n, _(n,1,n,0)?"":" not");
return 0;
}